练习2
小学数学三年级上册《练习二2》教案含教学反思
有错的分析原因并订正。
分析错误原因，有针对性地指导练习。
通过练习，你进一步掌握了哪些知识？能说一说学会的口算、笔算方法吗？还有哪些收获、
教学反思
这节课通过题组比较，学会两位数乘一位数（不进位）的口算，能正确口算得数。探索并学会两位数乘一位数（不进位）的口算。这种题型应多多练习，大部分学生掌握的不是太好。在理解算理的基础上，熟练掌握两三位数乘一位数的计算方法，并能熟练计算。
练习二2
主备教师
周次
4
总课时数
9
教学内容
练习二（2）教材第16页第8-13题。
课型
新授
教学目标
1.在理解算理的基础上，熟练掌握两三位数乘一位数的计算方法，并能熟练计算。
2.加强学生估算意识，能够运用所学知识解决简单实际问题，能对问题做出正确分析，提高解题能力。
3.经历与他人交流各自算法的过程，提高学生口头表达能力，培养学生学会合作学习。
（3）分组完成计算，集体订正。
2.练习二第11题。
让学生独立完成，同桌交流指正。教师巡视指导，学生完成后利用实物投影展示部分学生成果。
3.练习二第12题。
（1）出示情景图，让学生观察后说一说你获取到了哪些信息？先求什么？再求什么？
（2）学生独立完成，指名回答，集体订正。
这道题是怎样做的？先根据什么求第ห้องสมุดไป่ตู้个问题，再根据什么求第二个问题？
教学重点
理解算理并能熟练计算两三位数乘一位数的乘法。
教学难点
能应用所学知识对问题做出正确分析。
课前准备
教学课件
教学过程（师生互动）
二次备课
一、口算练习。
《现代汉语》Ⅱ练习（2）答案
《现代汉语》Ⅱ练习（2）答案《现代汉语》Ⅱ练习（⼆）[词类和短语]年级专业班级姓名学号⼀、名词解释1.词类：词类是词的语法分类。
划分词类的标准，是词在语法上的区别性特征。
词在语法上的区别性特征，简称词的语法特征，主要表现在以下三个⽅⾯：第⼀，词的语法形式；第⼆，词的组合能⼒；第三，词的造句功⽤。
2.充⾜性语法特征：所谓充⾜性语法特征，指的是可以成为充⾜条件的语法特征。
判定词性时，作为判定词性时的充⾜性语法特征要有明确的限定。
限定的形式是：“主体条件＋附加条件”。
3.同形异类：所谓同形异类，是指词的形式相同，但实际上属于不同的词类，在甲语法环境中是甲类，在⼄语法环境中是⼄类。
同形异类现象也叫兼类现象。
4.短语：由两个或两个以上的词按着⼀定的结构关系组合⽽成的⽐词⾼⼀级的语⾔单位，叫作短语。
短语有固定短语和⾃有短语的区别。
固定短语具有结构的凝固性和意义的整体性。
5.兼语短语：组成部分之间有连环套合的兼语关系，由前⼀动词的宾语兼做后⼀动词或形容词的主语，即动宾短语的宾语和主谓短语的主语套叠，形成⼀个宾语兼主语的兼语。
这样的短语就是兼语短语。
6.多层次复杂短语：由两个以上的词按着⼀定的结构关系组合⽽成、包含两个或两个以上层次的短语，叫作多层次短语。
多层次复杂短语是简单短语通过延伸、加合、交互、连环四种延展⽅法扩充⽽成。
⼆、简述题1.什么是词的语法特征？举例说明词的语法主要表现在哪些⽅⾯。
词类是词的语法分类。
划分词类的标准，是词在语法上的区别性特征。
词在语法上的区别性特征，简称词的语法特征，主要表现在以下三个⽅⾯：第⼀，词的语法形式。
指具备什么样的形式标记和变化⽅式。
有的语⾔可以借助于词的形态变化来划分词类。
例如英语：A 名词[单数、复数] B形容词[原级、⽐较级、最⾼级] C 动词[原形、过去式、过去分词、现在分词]horse（马）→horses high（⾼）→higher\highest deny（否认）→denied\denyinghat（帽⼦）→hats big（⼤）→bigger\biggest collect（收集）→collected\collectingtree（树）→trees old（⽼，旧）→older\oldest remember（记得）→remembered\remembering 第⼆，词的组合能⼒。
《练习二》教案(15篇)
《练习二》教案(15篇)《练习二》教案1教学内容：人教版数学三年级下册 10页练习二教学目标：【知识与技能】使学生熟悉的认识东、南、西、北、东北、西北、东南和西南八个方向，能够用给定的一个方向（东、南、西或北）辨认其余的七个方向，并能用这些词语描述物体所在的方向。
【过程与方法】通过同桌合作、集体交流以及小组交流引导学生参与、动手、动眼、动口（观察、比较、探究、评价）能在平面图上给定的一个方向（东、南、西或北）辨认其余的七个方向，进一步培养学生辨认方向的意识、发展空间观念。
【情感态度、价值观】通过动手操作练习设计，培养学生辨别方向的意识，获得学习成功的体验，产生热爱数学的兴趣，同时让学生充分地感受到数学与现实生活的密切联系，激发学生能运用所学习的知识解决生活中的`实际问题。
教学重难点：东，南，西，北，东北，东南，西北，西南八个方向的掌握。
根据参照物的不同，认清事物之间的方向关系。
教学过程：一、课前复习：1、说一说你知道的八个方位，并指一指2、老师说方位，学生指出来。
同桌互相合作（1人指方向，1人说出来，交换进行。
）二、引入1．看地图，找家乡。
师：同学们我们生活在地球上，我们都是中国人，那大家对我们的国家了解多少呢？现在我来考一考大家师：我们住在哪里啊？（指一指）师：谁能具体说一说，我们的家乡在中国的哪个方向？师：长城在我们家乡的什么方向呢师：判断方向你有什么好办法？（小组讨论，引导学生发现先写出八个方向图，再用实际位置对照）2．辨别家乡位置。
师：那我们来一起看看我们的家乡吧。
3．辨别学校位置。
师：再看一看我们的学校4．怎样去学校的道路。
师：小军说，我家住在学校的西南面，那小军家住在哪里呢？请同学们画出小军的家。
师：小红说，我家住在学校的北面，也请同学们画出小红的家。
（此处同学们拿出练习本，练习自己画一画）师：这时啊，小红的好朋友小丁来找到她，小丁要寄信给外婆，可是他不认识路，只有让小红带他去。
师：那他们应该怎样走呢？同学们来帮帮他们吧。
物理工练习题2及答案
练习题2一、单项选择题〔共25题〕1.点电荷Q 被曲面S 所包围，从无穷远处引入另一点电荷q 至曲面外一点，如下图，则引入前后： [ ]A. 曲面S 的电场强度通量不变，曲面上各点场强不变．B. 曲面S 的电场强度通量变化，曲面上各点场强不变．C. 曲面S 的电场强度通量变化，曲面上各点场强变化．D. 曲面S 的电场强度通量不变，曲面上各点场强变化。
【知识点】第5章【答案】D【解析】根据高斯定理，曲面S的电场强度通量只与曲面包围空间内的电荷总量有关；电量为q的点电荷移近后，曲面上各点场强将是电量为Q和q的点电荷两者产生的场强的矢量和。
2.半径为R的"无限长〞均匀带电圆柱面的静电场中各点的电场强度的大小E与距轴线的距离r的关系曲线为：[ ]【知识点】第5章【答案】B【解析】根据高斯定理，"无限长〞均匀带电圆柱面内部的电场强度为零，外部的电场强度分布与长直均匀带电线的电场分布一样。
3.如下图，一带负电荷的金属球，外面同心地罩一不带电的金属球壳，则在球壳中一点P处的场强大小与电势〔设无穷远处为电势零点〕分别为：[ ]P A.E = 0，U > 0．B.E = 0，U < 0．C.E = 0，U = 0．D.E > 0，U < 0．【知识点】第5章【答案】B【解析】静电平衡时，导体内部电场为零，导体为等势体，可以用金属球壳外外表上的电势来计算P点处的电势。
根据电势的计算方法，不难得到金属球壳外外表上的电势为负〔等效为外球面上带等量负电荷时的电势〕。
4.两个半径一样的金属球，一为空心，一为实心，两者的电容值相比拟[ ] A．一样 B.空心球电容小C. 实心球电容小D.大小关系无法确定【知识点】第5章【答案】A【解析】根据孤立导体电容的定义，两个半径一样的金属球，不管是空心还是实心，两者的电容值是相等的。
5.一平板电容器充电后保持与电源相接，假设改变两极板间的距离，则下述物理量中哪个保持不变。
无机化学练习（2）酸碱平衡,答案
无机化学练习（二）酸碱平衡，沉淀溶解平衡（答案）学号 姓名 得分一. 判断题（每题1分，共15分）分）1．强酸性水溶液中不含OH -，强碱性水溶液中不含H +。
-------------------------------------------------------------（〤） 2．将pH 值等于5.0的盐酸溶液冲稀1000倍，溶液的pH 值等于8.0----------------------------------------------（〤） 3．使甲基橙显黄色的溶液一定是碱性的。
------------------------------------------------------------------------------（〤） 4．在一定温度下，在一定温度下，改变溶液的改变溶液的pH 值，水的离子积不变。
---------------------------------------------------------（√） 5．弱电解质的解离度随电解质浓度的降低而增大。
-----------------------------------------------------------------（√） 6．在0.001 mol •L -1的稀H 3PO 4溶液中,H +的浓度为0.003 mol•L -1。
-------------------------------------------（〤） 7．将HAc 和HCl 溶液各加水稀释一倍，则两种溶液中[H +]浓度均减小为原来的1/2。
-----------------------（〤） 8．在H 3PO 4溶液中，由于第一步解离出较多的H +，抑制了第二，第三步解离，使K o a2、K o a3较小。
---（〤） 9．AgCl 水溶液导电性很弱，所以AgCl 是弱电解质。
--------------------------------------------------------------（〤） 10．用水稀释含BaSO 4固体的水溶液时，BaSO 4的溶度积不变，浓度也不变。
同 步 练 习 2
同步练习一、单项选择题（在每小题的备选答案中选出一个正确的答案，并将正确答案的序号写在括号内）1．先秦诸子中最重视文艺的是（）。
A．儒家B．道家C．佛家D．墨家2．称“诗言志”说为儒家诗论“开山的纲领”的人是（）。
A．朱光潜B．朱自清C．王国维D．陈中凡3．我国文论史上第一篇系统性的诗学论文是（）。
A．《文赋》B．《尧典》C．《毛诗序》D．《楚辞章句序》4．提出“诗人之赋丽以则，辞人之赋丽以淫”观点的批评家是（）。
A．王逸B．班固C．王充D．扬雄5．屈原首次明确提出的诗论主张是（）。
A．发愤著书B．诗言志C．发愤抒情D．诗缘情6．“发愤著书”说的提倡者是（）。
A．陆机B．司马迁C．屈原D．韩愈7．儒学成为钦定的官学是在（）时代。
A．汉武帝B．汉成帝C．汉宣帝D．汉文帝8．结束汉代今、古文经学之争的学者是（）。
A．郑玄B．董仲舒C．马融D．王充9．“六义”之名最早见于（）。
A．《毛诗序》B．《尚书尧典》C．《诗经》D．《周礼·春官》10．“六义”最初的顺序，排在第二位的是（）。
A．赋B．雅C．比D．风二、多项选择题（在每小题的备选答案中选出两个或两个以上正确的答案，并将正确答案的序号写在括号内，答案没有选全或有选错的，该小题不得分）1．由孟子开创的文学批评方法有（）。
A．以意逆志B．品第高下C．知人论世D．神韵说E．文质彬彬2．荀子开后世（）三位一体文学观的先河。
、征圣、A．自然B．文质C．明道D．征圣E．宗经3．提出“诗言志”命题的先秦典籍有（）。
A．《墨子》B．《庄子》C．《荀子》D．《尚书》E．《左传》4．扬雄提出的有关“赋”的主要观点有（）。
A．赋是“童子雕虫篆刻”B．赋的特点是“劝百讽一”C．“诗人之赋丽以则”D．“辞人之赋丽以淫”E．赋的风格“文质彬彬”5．《毛诗序》中提到的诗歌创作为政治服务的主要方式是（）。
A．“诗言志”B．“劝百讽一”C．“上以风化下”D．“下以风刺上”E．“文质彬彬”三、填空题（在每小题的空格处填写正确答案）1．汉儒将文学与学术区别开来，大致把学术称为“学”，把文学称为＿“文”＿＿＿＿。
OBCA练习题2
OBCA练习题21. 下列关于备份恢复哪些描述正确? *A、支持租户级别的恢复(正确答案)B、恢复过程包括租户系统表和用户表的 Restore 和 Recover过程C、数据备份指备份基线数据,包括全量备份和增量备份D、日志归档指日志数据的自动归档功能(正确答案)2. 集群扩容和缩容所需数据移动平衡操作由OceanBase自动完成无需用户干预 [判断题] *对(正确答案)错3. 以下哪些是OceanBase集群部署的常见方案? *A、三地四中心B、三地五中心(正确答案)C、2D、两地三中心(正确答案)4. OceanBase是如何避免随机写的? *A、oceanBase是一个准内存数据库的架构,存储又采用LSM Tree的架构,可以有效解决随机写和写放大的问题(正确答案)B、对数据的修改，比如insert、update等，都会先放到内存的MemTable中(正确答案)C、MemTable中的数据像传统数据库那样不定期的进行check point到硬盘中D、通过把增量数据与基线数据进行合并,顺序写入磁盘,可以有效降低写随机写(正确答案)5. 租户逻辑上类似传统数据库的实例,创建完成后,每个租户都将有自己的专属进程。
[判断题] *对错(正确答案)6. 同一个资源单元定义unit config（比如2C8G,或者4C16G等），可以被多个资源池使用。
[判断题] *对(正确答案)错7. 对于存量Oracle业务迁移到OceanBase上需要数据实时同步功能,建议使用哪个工具? [单选题] *A、oCPD、DataXC、 OMS(正确答案)D、ODC8. OCP管理集群时每个受管服务器需要安装OCP agent [判断题] *对(正确答案)错9. OceanBase数据库可以部署在哪些环境中? *A、虚拟化环境(正确答案)B、本地机器(正确答案)C、容器化环境(正确答案)D、云平台(正确答案)10. OceanBase集群灾难恢复等级是多少 [单选题] *A、5B、6(正确答案)C、2D、111. 关于OB原生分布式关系型数据库架构的优势下列描述正确的是? *A、数据高可靠+服务高可用:多副本一致性协议Paxos的工业级实现,个别节点发生故障时保证数据零丢失（RPO=0）和服务快速恢复（RTO<30秒）(正确答案)B、线性扩容随着业务量增加进行扩容（比如线上促销期间）,随着业务量减少进行缩容（比如促销后）(正确答案)C、高成本:对硬件要求高,需要使用高端小型机和存储D、灵活的部署方式:支持三中心、五中心、主备等多种部署模式(正确答案)12. Ooenabase数据库已经通过TPC-C测试认证 [判断题] *对(正确答案)错13. OceanBase可以实现动态的扩容和缩容。
练习题2
• 43、关于会计科目设置原则，正确的是（ ） • A.系统内的会计科目设置可参照国家制度，不用完全遵照 • B.会计科目的设置应当遵循会计科目的编码方案 • C.科目要保持稳定，会计年中不能删除任何科目无论使用与否 • D.科目设置只对总账模块有用，和其他模块无关 • 答案： B
练习题2
一、单项选择题
• 1、不向总账系统传递数据的模块是（ ） • A.UFO报表 • B.成本模块 • C.薪资模块 • D.固定资产 • 答案：A
• 2、不属于总账的基本功能是（ ） • A.提供凭证处理、出纳管理的功能 • B.可自动完成月末分摊、计提、对应转账、期间损益结转等业务 • C.进行科目试算平衡、对账、结账、生成月末工作报告 • D.生成财务报表如资产负债表、利润表等 • 答案： D
• 12、关于删除科目的说法，（ ）是正确的 • A.被删除的科目不必为末级科目 • B.被删除的科目，一定是本年度未被使用过的 • C.被删除科目可以有余额 • D.被删除的科目可以通过恢复功能进行复原 • 答案： B
• 13、关于指定科目的主要功能描述错误的是（ ） • A.确定主管会计专管科目 • B.被指定科目在制凭证过程中可进行支票和资金赤字控制 • C.指定需填写现金流量项目的科目 • D.指定现金和银行的所有末级科目 • 答案： A
• 7、U8总账模块支持的多语言不包括（ ） • A.中文简体
• B.中文繁体 • C.英文 • D.日文 • 答案： D
二年级上留言条练习 2
二年级上留言条练习 2
1、5月11日,小红的爸爸临时决定下午2点钟出差去上海,要过三天才能回来。
爸爸要小红在家听妈妈的话,请你替小红的爸爸写一张留言条。
小红：
我临时决定下午2点钟出差去上海,要过三天才能回来。
我不在的
时候你要听妈妈的话。
爸爸
5月11日2、王明让李红明天上午8点在家等他一起去公园植树,请你替王明写张留言条。
李红：
你明天上午8点在家等我,我们一起去公园植树。
王明
3月11日
3、7月5日下午小强到小芳家来还书,可小芳没在家,他把书交给了邻居王奶奶,请她转交给小芳。
请你帮小强写一张留言条。
小芳：
我今天下午来你家还书,可你不在家,我把书交给你的邻居王奶奶,请
她转交给你。
小强
7月5日
4、12月8日是明明的生日,明明想让小强那天去吃饭,可小强不在家,你帮明明给小强写一张留言条。
时间是12月1日。
小强：
12月8日是我的生日,我想请你那天来我家吃饭。
明明
12月1日。
无机化学练习题2
（1） △H0 =146kJ/mol, △S0 =111J· K–1 （2）T=1315K mol·
14.已知25℃时，反应2NO(g)+O2(g)==2NO2(g)的 △rGmo=-69.70kJ /mol, 当p(NO)=20.27kPa， p(O2)=10.13kPa，p(NO2)=70.93kPa时， 反应方向为( ) A.正向 B.逆向 C.平衡 D.无法判断
27、对反应2A(g) + B(g)→3C(g)，已知A、B 浓度(mol· -3)和 dm 反应初速υ(mol· -3·-1)的数据如下： dm s c(A)mol· -3 dm c(B)mol· -3 dm Vmol· -3·-1 dm s (1) 0.20 0.30 2.0×10-4 (2) 0.20 0.60 8.0×10-4 (3) 0.30 0.60 8.0×10-4 A 和B 的反应级分别是（ ）和（ ） ；反应的速率方 程是（ ）。
3D
4B
5.任何一个化学变化，影响平衡常数数值的因素是： (A) 反应产物的浓度 (B) 催化剂 (C) 反应物的浓度 (D) 温度
6.下列各热力学函数中，哪一个为零：： (A) DfGm°(I2, g. 298 K) (B) DfHm°(Br2, l. 298 K) (C) Sm°(H2, g. 298 K) (D) DfGm°(O3, g. 298 K)
26.反应H2O2(aq)—→H2O(l)+0.5O2(g)在300K时的活化能为75.3 kJ· -1 。若分别用I- 和酶催化，活化能分别降为56.5 kJ· -1 mol mol 和25.1 kJ· -1 。计算在相同温度下，催化反应的速率分别是 mol 无催化反应速率的多少倍？
k2 / k1 = 1.9×103 , k3 / k1 =5.5×108。
练习题2
一、填空1．用古典法求算概率．在应用上有两个缺点：①它只适用于有限样本点的情况；②它假设（ ）。
2．若事件A 和事件B 不能同时发生，则称A 和B 是（ ）事件。
3．在一副扑克牌中单独抽取一次，抽到一张红桃或方片的概率是（ ）；在一副扑克牌中单独抽取一次，抽到一张红桃且爱司的概率是（ ）。
4.设A,B 为两个事件，若概率P(A)=41,P(B)=32,P(AB)=61,则概率P(A+B)=＿＿．5.设A,B 为两个事件，且已知概率P(A)=0.4,P(B)=0.3，若事件A,B 互斥，则概率P(A+B)=＿＿．6.设A,B 为两个事件，且已知概率P(A )=0.7，P(B)=0.6,若事件A,B 相互独立，则概率P(AB)=＿＿．7.设A,B,C 为三个事件，且已知概率P(A)=0.9，P(B)=0.8，P(C)=0.7，若事件A,B,C 互不相容，则概率P(A+B+C)=＿＿．8.已知离散型随机变量X 的概率分布如下表４１４１21P321X则概率P ｛3 X ｝=＿＿．二、单项选择1．古典概率的特点应为（）A 、基本事件是有限个，并且是等可能的；B 、基本事件是无限个，并且是等可能的；C 、基本事件是有限个，但可以是具有不同的可能性；D 、基本事件是无限的，但可以是具有不同的可能性。
2．随机试验所有可能出现的结果，称为（） A 、基本事件； B 、样本； C 、全部事件； D 、样本空间。
3、以等可能性为基础的概率是（） A 、古典概率； B 、经验概率； C 、试验概率； D 、主观概率。
4.任一随机事件出现的概率为（） A 、在–1与1之间； B 、小于0； C 、不小于1；D 、在0与1之间。
5.若A 与B 是任意的两个事件，且P （AB ）＝P （A ）·P （B ），则可称事件A 与B （） A 、等价 B 、互不相容 C 、相互独立 D 、相互对立。
6.投掷两颗均匀般子，则出现点数之和等于6的概率为( ).(a)111 (b)115 (c)361 (d)3657.设A,B 为两个事件，若概率P(A)=31,P(B)=41,P(AB)=121，则( ).(a)事件A 包含B (b)事件A ，B 互斥但不对立 (c)事件A ，B 对立 (d)事件A ，B 相互独立8.设A,B 为两个事件，且已知概率P(A)=53,P(A+B)=107,若事件A,B 互不相容，则概率P(B)=( ).(a)161 （b)101 (c)41 (d)529．二项分布的数学期望为（ ）。
前厅服务练习 2
前厅服务练习一、情景对话练习（一）客房预订服务对话1.散客电话预定预订员：早晨好，这里是国际大酒店客房预订处，很高兴为您服务。
客人：我要订一间客房。
预订员：请问是订标准间，还是套间？客人：标准间吧。
预订员：标准间是每晚680元人民币，您什么时间入住，住几天？客人：12月15日，住三个晚上。
预订员：12月15日，住三个晚上，也就是12月18日离店，对吗？客人：是。
预订员：请问您的姓名。
客人：李军预订员：是君子的君吗？客人：不，是军人的军。
预订员：李先生，您是乘飞机还是火车？客人：飞机。
预订员：李先生，请问飞机的航班号？客人：让我看一下……是COS118。
预订员：航班号是COS118。
李先生，请问您需要接机服务吗？客人：不用了，我的朋友会接我。
预订员：请问您是现金结账还是用信用卡？客人：现金。
预订员：现在是旅游旺季，饭店只能将预订的客房保留至入住当日的18：00以前。
如果您用信用卡担保，饭店可以把您预订的房间保留至次日12：00以前，您需要用信用卡保证您的订房吗？客人：不用了。
我们下午4点就能到了。
预订员：好吧，请问您的联系电话和传真？客人：打电话就可以了，电话是139********。
预订员：好多。
李先生，请您核对以下内容，您订了一间标准间，每晚680元人民币，12月15号入住，18号离店，飞机的航班号是COS118，用现金结账，您的联系电话是139*******。
还有什么需求？客人：这样就可以了。
预订员：谢谢您来订房，我们将恭候您的光临，再见。
客人：再见。
2.团队电话预订预订员：早晨好。
这里是国际大饭店客房预订处，可以帮到您吗？客人：我是大连快乐之旅旅行社计调部，要安排一个团队入住贵饭店。
预订员：请问先生，怎么称呼您？客人：王鹏。
预订员：王先生，请问团队多少人？何时抵店？住几天？客人：11月1日入住，住4天，大约80人。
预订员：需要套间还是标准间？需要客房几间？客人：先预订40间标准间？需要客房几间？预订员：请您稍等，我查一下……11月1日入住，住4天，也就是11月5日离店，饭店可以做好安排。
有机化学练习题2及其答案
一、命吏或写结构1、 ㈀2、 3-戊酮或二乙酾 Љ ဉ 乙酰乙酸乙酯3、 〒4、 E-3m 乙基-2-己烯 对苯醌 㐀 む5、。
6、对苯二酺 N-甲基苯胺7、 邻苯二甲酸酐 む。
¸、 뀀 （2S,3S ）-2-甲基-3-氯丁酸9、 10、苯甲酰氯 甘氨酰半胱氨酸11、1-苯基-2-丙醇12、乳酸13、甲基环己烷的优势构象14、3-戊烯-1-炔15、β-硝基萘 16、pyridine17、苯乙醚 18、2,3-巯基丁二酸 19、D-果糖20、1,2-环氧丙烷二、单选题：1、下列共价键最容易极化的是（D ）A 、C －ClB 、C －H C 、C －FD 、 C －I 2、氯乙烯分子中存在的共轭效应是（ B ）A 、π-πB 、p-πC 、σ-πD 、σ- p 3、下列化合物能使Br 2/CCl 4褪色的一类物质是（ C ）。
A 、alcoholB 、alkaneC 、alkeneD 、ether4、樟脑的结构为 ，理论上其旋光异构体数目是（B ）A 、2B 、4C 、6D 、85、下列自由基相对最稳定的是：（D ） A 、H 3C · B 、CH 3CH 2· C 、(CH 3)2CH · D 、CH 2=CHCH 2·6、下列化合物相对最稳定的是（D ）A 、环丙烷B 、环丁烷C 、环戊烷D 、环己烷7、下列化合物具有芳香性的是（D ）C H 3C CC 2H 52CH 2CH 3H Cl H COOH3H CH 3CH 3COCH 2COOC 2H 5CH 3CH 2COCH 2CH3NHCH3OO O O OCOCl H 2NCH 2CONHCHCOOH2SH OCH 23OHCH 3CHCOOHOHCH 3HHC C CH CH CH 3NO 2NOCH 2CH3HOOC CH CH COOH C CH 2OHHOH OH H H HO O CH 2OHOA 、B 、C 、D 、8、一氯甲烷水解反应的特点是（D ）A 、属于S N 1反应B 、生成碳正离子中间体C 、反应速率与亲核试剂浓度无关D 、反应一步完成 9、乙醇和丙醇可用下列哪种试剂鉴别（D ）。
民法练习题2
民法（2）出题人091150211徐亚灵做题人091150212李源一、单项选择题（共10小题，每题2分，共20分）1、下列关于债的移转的说法不正确的是（）。
A、债的移转是债的主体发生变更B、债的移转包括债权让与和债务承担两种类型C、债的移转使债内容的统一性发生变化D、债的移转不同与债的变更，前者是债的主体发生变更，后者是债的内容发生变更2．A县甲借给B县乙10万元，B县乙借给C县丙20万元，此两项借款均已届还款期限，甲急于用钱，但经调查了解乙无力还款，便多次催促乙向丙索还欠款，乙置之不理。
请回答下列问题：(1)在已知乙无力还款的情况下，甲欲实现债权，可行使何种权利？A债权保全撤销权B债权保全代位权C申请法院强制执行D申请法院发出支付令3、债权让与后债权人须履行登记手续的债权为（）。
A、转让火车票B、票据背书C、转让电影票D、记名股票转让4、甲公司与乙公司合并为一个公司，公司名称仍为甲公司。
乙公司丁公司的债权和戊公司的债务由甲公司承受，这种债的变更在法律上被称为（）A、债权债务的概括承受B、债务移转C、混同D、债权让与5、下列哪一当事人的主债务可以代为清偿？（）A、技术服务合同中提供服务的债务B、雇佣合同受雇佣者C、买卖合同的买方D、加工承揽合同中的承揽人6、甲和乙签定了一项加工合同，由甲负责加工乙的西服套装，加工费为1000元。
甲欠乙1000元钱。
问下列那种情形甲的债权可以和乙的债权抵销？（）A、乙的债权尚未到清偿期而甲的债权已到期，乙提议抵销的B、乙的债权尚未到清偿期而甲的债权已到期，甲提议抵销的C、乙的债权已逾诉讼时效，甲的债权未逾诉讼时效，乙提议抵销的D、甲的债权已逾诉讼时效，乙的债权未逾诉讼时效，甲提议抵销的7、债务人将标的物提存后，标的物毁损、灭失的风险由谁承担？（）A、债务人B、债权人C、提存部门D、债务人和债权人共同承担8、下列关于免除的说法不正确的是（）A、免除是债权人抛弃债权的意思表示B、免除是无因行为C、免除是处分行为D、免除需取得债务人的同意9、债务人提存标的物的，债务人和债权人的合同权利义务关系何时终止？（）A、提存机关公告B、提存有效成立C、债权人知道提存D、债务人提出提存申请10、甲对乙享有100万元的合同债权，该债权具有可转让性。
辨析修改病句练习 2
辨析修改病句练习(2008-08-29 06:50:00)转载分类：校园生活标签：校园★阳光演练1．下列各句在表达上没有语病的一句是 ( )A.为了防止这类交通事故不再发生，我们加强了交通安全的教育和管理。
B．不管气候条件和地理环境都极端不利，登山队员仍然克服了困难，胜利攀登到顶峰。
C．该市有人不择手段仿造伪劣产品，对这种坑害顾客骗取钱财的不法行为，应给以严厉打击。
D．马教授领导的科研组研制出能燃用各种劣质煤并具有节煤作用的劣质煤稳燃器，为节能作出了重大贡献。
2．下面是一则广告，有人对其中六处提出了修改意见、，把这些意见分成四组，最恰当的一组是( )这个工厂经工程技术人员精心研究设计，推出新产品彩色搪瓷浴缸，具有造型美观，瓷画光滑，色彩鲜艳，质量稳定，经久耐用等特点，适应中、高档宾馆，饭店及现代住宅理想卫生沽具。
①“经久”改为“坚固”②“洁具”改为“用具”③“适应”改为“适宜作”④“理想”前加“的”字⑤“卫生”前加“的”字⑥“新产品”后加“破折号”A. ①④⑥B. ①②⑤C，②③④ D．③⑤⑥3．下列各句在表达上没有语病的一句是 ( )A．这个文化站已成为教育和帮助后进青年，挽救和培养失足青年的场所，多次受到上级领导的表彰。
B．电子工业能否迅速发展，并广泛渗透到各行各业中去，关键在于要加速训练并造就一批专门技术人才。
C．你知道每斤蜂蜜中包含蜜蜂的多少劳动吗?据科学家统计，蜜蜂每酿造一斤蜜，大约要采集50万朵的花粉。
D．先生侃侃而谈，他的音容笑貌虽然没什么变化，但眼角的皱纹似乎暗示着这些年的艰辛和不快。
4．下列各句，没有语病、句意明确的一句是 ( )A．县里的通知说，让赵乡长本月15日前去汇报。
B．睡眠三忌：一忌睡前不可恼怒，二忌睡前不可饱食，三忌卧处不可当风。
C．文件对经济领域中的一些问题，从理论上和政策上作了详细的规定和深刻的说明。
D. 一个好的比喻，或为形状，或为神似，或为形神兼似，总是离不开相似这一根本特点。
管理会计练习题2
管理会计练习题一、单选题1.管理会计所需要的资料主要来源于（ A ）A.财务会计B.统计C.销售部门D.生产部门2.变动成本法下的本期销货成本计算公式是（b ）A.单位完全生产成本×本期销量B.单位变动生产成本×本期销量C.期初存货+期末存货-本期发生的产品成本D.本期发生的产品成本+期末存货成本3.某产品销售收入800元，保本额500元，变动成本率为65%，则该产品的利润为( a )A.105销售收入800元，保本成本500元，变动成本率65%。
变动成本=保本成本*变动成本率=500*65%=325元。
固定成本=保本额-变动成本=500-325=175元。
销售成本=销售收入*65%=800*65%=520元。
实际成本=销售成本+固定成本=520+175=695元。
利润=销售收入-实际成本=800-695=105元。
元 B.280元C.175元D.195元4．付现成本是( b )需以现金支付的成本。
A．过去B．现在C．将来 D.都不是5．企业五年前购进了一台机器，现已折旧，拟购买一台价值为40000元的更新式机器取代，卖方提出可以用旧机器作价14500元进行交换，其余的25500元以现金支付，则该方案的付现成本是(c )元。
A．40000 B．14500 C．25500 D. 110006．公司购买的一次还本付息债券，只能在到期时获得约定的收益，因而不会产生的成本是( b )。
A．沉没成本B．机会成本C．差量成本D．固定成本7．当利润实现最大化时，边际成本与边际收入的关系是( c )。
A．边际收入大于边际成本B．边际收入小于边际成本C．边际收入等于边际成本D．边际收入与边际成本无关8. 与生产批量成正比，与生产批次成反比的是( a )。
A．储存成本B．相对成本C．订货成本D．生产准备成本9. 设某厂需要零件甲，其外购单价为10元。
若自行生产，单位变动成本为6 元，且需要为此每年追加10000元的固定成本，通过计算可知，当该零件的年需要量为( a )件时，两种方案等效。
《练习二》教案15篇
《练习二》教案15篇《练习二》教案1教学目标1、通过练习使学生进一步掌握长方形、正方形的面积计算方法。
2、通过实践活动，培养学生解决实际问题的意识能力。
3、结合解决实际问题的过程，进行简单的面积换算。
教学重点能运用有关面积方面的知识解决生活中的实际问题。
教学难点通过实践活动，培养学生解决实际问题的意识能力。
教具准备实物投影、挂图等。
教学过程一、复习导入可爱的小熊听说同学们今天要上一节活动课，它非常想和大家一起来做游戏。
但是河马老师要求它必须答对下面这道题才能来到这儿。
它能顺利通过考试吗？请你也来连一连。
一枚小纽扣1平方米电灯开关的正方形底座1平方厘米一张方桌表面1平方分米二、学中做1、完成“练习二”第7题。
2、学校要在楼后的长方形空地上建造花坛以美化校园。
请你根据图示，求出ABCD四块花坛的总面积。
3.将正确答案的序号填在（）里。
（1）边长是100米的正方形草坪，占地面积是1（）。
A.平方米B.公顷C.千米（2）周长相等的长方形和正方形的面积比（）A.面积同样大B.长方形面积大C.正方形面积大（3）至少用（）个同样大小的正方形可拼成一个大正方形。
A.2B.4C.8（4）测量土地时，一般用（）做单位。
A.平方分米B.平方千米C.平方米4．完成“练习二”第8题5．一个长方形果园长78米、宽50米，面积是多少？如果在这个果园的四周围上篱笆，篱笆长多少米？三、做中得1．综合练习（1）选适当的单位填空。
①一个鱼池占地2500（）②天安门广场的'面积大约是40（）③教室的面积大约有50（）④我国领土大约是960万（）⑤妈妈的手掌大约1（）。
（2）完成“练习二”中的数学游戏。
（3）宁宁假期去乡下的奶奶家玩。
正巧叔叔要搭一个花棚。
他先打下了四个桩，定下了长方形的四个顶点。
量了之后，长是24米，宽16米。
他正准备用塑料搭棚，宁宁说：“叔叔，我还能围出一个更大的地方。
”宁宁把好方法讲给叔叔听，叔叔连忙说好。
英语练习题2习题及答案
Ⅰ. 单选题1. Eyes play an important role in body balance and it is important to ____ as much informationfrom the environment as possible.A. absorbB. involveC. inventD. conquer2. Whatever one has planned to do is ____ to be altered in the process.A. prohibitedB. eagerC. embarrassedD. bound3. If your children are spending too much time on computer games, think carefully about how youare going to ____ the situation.A. accomplishB. arrangeC. handleD. decrease4. She fell asleep at last, but in no time at all the pain in her back ____ her again, sharp and insistent.A. conqueredB. wakenedC. absorbedD. retired5. Early in the morning, I was ____ out of bed to repair a minor fault on the car.A. distractedB. draggedC. wakenedD. assigned6. You should make sure you know where the parents can be ________, and that they have givenyou all the information you are likely to need about the child.A. connectedB. communicatedC. committedD. contacted7. On one _______, they locked her in a car when they went to a call and wound up the window toprevent her overhearing ( 偷听).A. occasionB. campusC. voyageD. basis8. If you wish, we can ______ for your luggage (行李) to be sent on ahead to each of the overnight stops.A. memorizeB. contractC. arrangeD. commit9. The boy ______ turned the TV off as the clock struck ten, time for him to go to bed.A. reluctantlyB. disappointedlyC. fortunatelyD. undoubtedly10. I started to read newspapers and magazines more, and, for just about the firsttime in my life, I began to take an interest in _______ affairs.A. personalB. currentC. ancientD. social11. I ’d like to ________ that students should be allowed more time for independent study.A. proposeB. commandC. arrangeD. steer12. On a ________ day, our professor works in the lab from 9 A.M. to 11 P.M..A. followingB. typicalC. previousD. diligent13. He might as well have picked a family ________ out of the telephone book and stayed withthem.A. at randomB. at a timeC. after allD. in detail.14. The books are beautifully ____ with drawings and photographs.A. illustratedB. designedC. writtenD. covered15. A sign at our local church is in wood, with gold lettering, but the ____ is already fading afterthree years.A. productB. latterC. laterD. medal16. The ____ table ( 写字台)takes up too much space in my small office.A. to writeB. writingC. writtenD. write17. They failed to convince her of his ____.A. honestyB. honestC. dishonestlyD. honestly18. He suggested that the novel ____ into a film.A. makeB. madeC. makingD. be made19. His report on the Olympic Games was really ____.A. exciteB. excitingC. excitementD. excited20. Mary picked ____ a book from the floor and began to read.A. onB. inC. outD. up21. She is young and ____, but she is good at learning.A. experienceB. inexperienceC. experiencedD. inexperienced22. His classmates tried to persuade him ____ swimming across the river, but he did not listen.A. fromB. inC. onD. to23. Nowadays we rely more and more ____ computers to help us in doing everything.A. inB. fromC. onD. to24. Ann has a wheelchair that was ____ designed for her.A. especiallyB. especialC. specialD. specially25. You are ____ to fail the exam if you don ’t do any revision.A. boundB. bunchC. relyD. pick答案：1.A 2.D 3.C 4.B 5.B 6.D 7.A 8.C 9.A 10.B 11.A 12.B 13.A 14.A15.B 16.B 17.A 18.D 19.B 20.D 21.B 22.A 23.C 24.D 25.A1. Large-scale studies are needed to____ the encouraging results we have obtained so farA. conductB. confirmC. contractD. commit2. Whoever disobeys the company s safe’t y regulations shall be＿＿on the spotA. dismissedB. switchedC. interruptedD. revealed3. All the questions the police asked____ what she had been doing on the night of therobberyA. brought upB. revolved aroundC. built onD. singled out4. If schoolchildren are allowed to work at their own____, their performance will generallyimproveA. versionB. paceC. evolutionD. system5. To attract foreign investors, you have to____ them that their investment will have profitablereturnsA. confirmB. stimulateC. grabD. convince6. The conference was an attempt to____ discussion of the problem of widening gaps between therich and the poorA. stimulateB. conductC. intendD. uncover7. The clerk held my passport four inches from his face and____ to read itA. affectedB. flippedC. strainedD. giggled8. If these problems are not____ early in their training, they can be a real danger to themselves andto their instructorsA. skippedB. contractedC. spottedD. responded9. Tourism authorities ____ quickly to reports of the attack, claming that it was accidental and thatcrime against tourists was quite rare in the scenic areasA. addedB. fastenedC. skippedD. responded10. To ____ for the position, applicants would need to have a PhD degree and 3 year s workin’gexperienceA. strainB. qualifyC. registerD. campaign11. ____his age, he can not finish this task all by himself.A. GivenB. GiveC. GaveD. Giving12. The travelers were about to cross the river____ a storm broke.A. thenB. atC. thereD. when13. You are meant____ before you come in.A. payB. payingC. to payD. paid14. I don’t teach____ I think I know the answer.A. thatB. whyC. whenD. because15. He entered the office____ by the way she had spoken to him.A. annoyedB. annoyingC. annoyD. annoys16. The road gradually widened until we found____ in a large valley.A. meB. usC. ourD. ourselves17. He will help you to prepare____ you need to say in the meeting next week.A. thatB. whatC. whichD. when18. Little____ guess that in a few year s’t ime the young man who used to live next door to themwould become a superstar.A. does theyB. they doesC. did theyD. they did19. He ran as____ as he could in the hope of breaking his record for the five miles.A. harderB. hardlyC. hardestD. hard20. ____ the whole country rose up to drive the aggressors from their homeland.A. It is long before thatB. It wasn ’t long before thatC. It isn ’t long before thatD. It wasn ’t long before that21. ---“B en looks pale, what ’s happened to him? “---“N othing serious, just____ he was a bit upset about losing the game. ”A. thatB. whenC. whyD. as22. I would rather____ early, and get home before it gets dark.A. to goB. goingC. goneD. go23. Needless to say, we place our hope on____ young.A. aB. manyC. theD. an24. All research is built____ work completed by previous researchers.A. onB. atC. inD. out25. This show will no doubt add____ his reputation.A. onB. atC. inD. to答案：1 2 3 4 5 6 7 8 9 10B A B B D AC CD B11 12 13 14 15 16 17 18 19 20A D C D A DBCD B/D21 22 23 24 25A D C A DPart II. ClozeMany of you are studying English and you may be wondering why it is so difficult to learn ．Itis actually not that difficult to learn _1_ you know some basic facts _2_ the language and theculture that it reflects ( 反映)．Perhaps the first thing you need _3_ English is that it is _4_ up of several other languages such_5_ French, German ,Latin ,Greek Anglo-Saxon ．_6_ addition ,there are words from Spanish in English and many American Indian words and names; _7_ some Chinese and Japanese words have found their way _8_ the English language ．This borrowing of words from _9_ languages is oneof the key reasons for some of the difficulties that people meet with _10_ they are learning English ．1．A. so B. and C. but D. if2．A. with B. about C. at D. in3．A. know B. knowing C. to know D. known4．A. make B. making C. maked D. made5．A. as B. for C. that D. was 6．A. also B. in C. but D. yet 7．A. even B. in C. from D. to8．A. even B. into C. from D. to9．A. a B. an C. any D. other 10．A. while B. that C. which D. since答案：1.D 2.B 3.C 4.D 5.A 6.B 7.A 8.B 9.D 10.A阅读理解Passage oneI was born in the city of York, in England, in the year 1632. My father was a man of some wealth, able to give me a good home and send me to school. It was his wish that I should be a lawyer buy my head began to be filled very early with thoughts of rambling, and I would be satisfied with nothing but going to sea. My father gave me strong and earnest counsel against it,but with little effect. One day, being at Hull, I met a school-fellow who was about to sail for London in his father's ship, and he prompted me to go with him, and in an evil hour, without asking God's blessing or my father's, I went on board.On the way to London, a storm arose, the ship was wrecked, and we barely escaped with our lives. I went on foot to London, where I met with the master of a vessel which traded to the coastof Africa. He took a fancy to me, and offered me a chance to go with him on his voyages, which I gladly accepted.A great storm came up, and the ship was tossed about for many days, until we did not know where we were. Suddenly we struck a bank of sand, and the sea broke over the ship in such a way that we could not hope to have her hold many moments without breaking into pieces. In this distress we launched a boat. After we had been driven four or five miles, a raging wave struck usso furiously that it overset the boat at once. Though I swam well the waves were so strong that Iwas dashed against a rock with such force that it left me senseless. But I recovered a little beforethe waves returned, and, running forward, got to the mainland safely.1. What did the author want to do when he was young?A. To visit AfricaB. To sail the seasC. To practice lawD. To make a tour of London2. Why did the author go on foot to London ？A. The ship he took was destroyed in a storm.B. His father did not supply the fare for the journey.C. He went against his father ’s strong device not to do so.D. His school-fellow invited him to go together.3. Why did they launch a boat?A. They know they were near a shore.B. The big waves were about to overturn the ship.C. Their ship had been knocked about for may days on the sea.D. Their ship had struck sand and was about to break into pieces.4. When the author got to the mainland, he ____.A. searched everywhere for his lost companions.B. fell down on the ground senseless.C. was safe and sound.D. ran forward to escape being washed back into the sea.5. When the author finally arrived on land, he most probably ____.A. knew he was in Africa.B. did not know where he was.C. was not aware he was back in England.D. got in touch with his family and asked for help.Passage twoSome people have it easy. When their kids ask them what they do at work, they can give asimp1e direct answer: “I put out fires ”or ”“I fix sick peop1e ”or ”“I teach primary sch theoretica1 physicist, I never had this 1uck . Society has come to expect many things from thephysicist. 1t used to be that me on1y bad to discover the basic 1aws of the wor1d and supp1y thetechniques that wou1d power the next of things we think we know how to do. What makes usuncomfortab1e- and what makes it hard for us to te11 our kids what we -is that in’thi s re up tocentury we have become, though unwi11ing1y, gurus on questions such as “what is the nature ofRea1ity (现实) ?”We now deal with a whole new c1ass of prod1ems .We ask how the wor1d began and what isthe nature4 of matter. The answers we are coming up with are just not easy to comprehend for theaverage person.So, when physicists get out of their cars in the morning, have a cup of coffee and sit down infront of their computers, they 1eave a fami1iar wor1d and enter a p1ace where things act in ofstrange ways that are impossid1e for ordinary peop1e to understand.6.According to the passage, in a way physicists areA. intel1igentB. comfortad1eC. strangeD. un1ucky7. Judging from the context, the word: “gurus in”the first paragraph most probab1y means aperson.A. who acts as a teacher and answers big questionsB. who gives wrong answers to big questionsC. who does not 1ike to answer big questionsD. who is eager to supp1y answers to big questions8. Which of the fo11owing is true according to what the author says about physicists?A. physicists do not 1ike their job.B. Physicists 1ive in two different wor1ds.C. Physicists are coming up with new answers to o1d questions.D. Physicists don ’t have to te11 peop1e what they are doing.9. Which of the fo11owing statement is true?A. Theoretica1 physicists on1y have to answer the basic questions about the wor1d.B. Theoretica1 physicists contributed do the new industry on Si1icon Va11ey.C. Theoretoca1 physicists have disappointed the expectations of many peop1e.D. Theoretica1 physicists have found it hard to friends with ordinary peop1e.10. Which of the fo11owing is true shout the job of physicists?A. It is getting more and more difficu1t.B. It is beyond the comprehension of ordinary peop1e.C. A person with average inte11igence can not do it.D. Both A and B.答案：1.B 2.A 3.D 4.C 5.B 6.D 7.A 8.B 9.B 10.BPassage oneA couple of years ago I spent the day at an elementary school in New Jersey. It was a nice average school, a square and solid building, full of reasonably well-behaved kids from middle-class families. I handled three classes, and by the time I staggered out the door I wanted tolie down for the rest of the day.Teaching s’the toughest job there is. In his new memoir, “Teacher Man,”Frank McCourt recalls telling his students, “Teachingi s harder than working on docks and warehouses. ”Not to mention writing a column. I can stare off into the middle distance with my chin ( 下巴) in my hand any time. But you go mentally south for five minutes in front of a class of fifth graders, and you aresunk.The average new teacher today makes just under $30,000 a year, which may not look too badfor a twenty-something with no mortgage (抵押贷款) and no kids. But soon enough the new teachers realize that they can make more money and not work anywhere near as hard elsewhere.After a lifetime of hearing the old legends about cushy ( 舒适安逸的) hours and summer vacations, they figure out that early mornings are for students who need extra help, evenings are for test corrections and lesson plans, and weekends and summers are for second and even third jobs to tryto pay the bills.According to the Department of Education, one in every five teachers leaves after the firstyear, and almost twice as many leave within three. If any business had that rate of turnover, someone would do something smart and strategic to fix it. This isn ’t any busi n esss. I t h e most’important business around, the gardeners of the landscape of the human race.Unfortunately, the current way of dealing with problems in education is taken directly from business practice, and it s a terrib’l e fit. Instead of simply acknowledging that starting salaries are woefully low and committing to increasing them and finding the money for reasonable recurringraises, politicians have wasted decades talking about something called merit pay ( 奖励工资). It s a’concept that works fine if you're making toys, but kids aren t’toys, and good teaching isn t’an assembly line.1. What can we infer from the first paragraph about teachers?A. They have to teach three classes at a time.B. They have a very rewarding job.C. They prefer to teach children from middle-class families.D. They have a very hard job to do.2. Why does the author say teaching is tougher than writing a column?A. Teaching is like working on docks and warehouses.B. Teaching demands full attention.C. Teachers have to work with children.D. Teachers have no chance to go traveling.3. What do new teachers find out after some practice?A. Their starting salary is lower than offered by other occupations.B. They have to work during vacations to make ends meet.C. They have to plan their time well to get everything done.D. They can take a second or even a third job besides teaching.4. We can infer from the fourth paragraph that the author thinks __________.A. measures should be taken to keep teachers in their jobsB. the rate of turnover in teaching is low compared to other occupationsC. it s’natural for a number of teachers to quit in three to five yearsD. it s’fair to call teachers the gardeners of the landscape of the human race5. What does the author think of merit pay?A. It will make up for teachers low startin’g salaries.B. It will bring down the turnover rate of teachers.C. It is a good fix for current educational problems.D. It is not suitable for the teaching profession.Passage twoI ’m coming off this plane, and landing at London airport. I ’m looking around for a middle- aged woman, my Aunt Penn, who I ve se’en in pictures. The photographs are out of date,but she looked like the type who would wear a big necklace (项链) and flat shoes, and maybe some kind of narrow dress in black or gray. But I'm just guessing since the pictures only showedher face.Anyway, I m’l o oking and looking and everyone ’s leaving a s n n d o t h s e i g r e n a l on m’y phone and I'm thinking, Oh gr“eat, I'm going to be abandoned at the airport so that's two countries theydon't want me in, ”when I notice everyone s gone’except this kid who comes up to me and says,“You must be Daisy.”And when I loo k relieved he does too and says. m Edmon“d.”I ’“Hello Edmond, ”I say, nic“e to meet you. ”I look at him hard to try to get a feel for whatmy new life with my cousins might be like.Now let me tell you what he looks like before I forget because it's not exactly what you'd expect from your average fourteen-year-old what with the cigarette and hair that looked like he cutit himself with a knife in the dead of night, but aside from that he's exactly like some kind of mutt,you know the ones you see at the dog shelter who are kind of hopeful and sweet and put their nose straight into your hand when they meet you with a certain kind of dignity and you know from thatsecond that you're going to take him home? Well that s him. ’Only he took me home.I ’l l take your b ag, he said, and even though he s about h’alf a mile shorter than me and has arms about as thick as a dog leg, he grabs my b ag, and I grab it back and say Where's yo“ur mom,is she in the car?”And he smiles and takes a drag on his cigarette, which, even though I know smoking killsand all that, I think is a little bit cool, but maybe all the kids in England smoke cigarettes? I don ’tsay anything in case it s’a well-known fact that the smoking age in England is something liketwelve and b y making a big thing about it I ll end up l’o oking like an idiot when I ve barely’b eenhere five minutes. Anyway, he says. “M um couldn't come to the airport because she's working,and everyone else seemed to be somewhere else, so I drove here myself.”6. Daisy flew to London to ________.A. see EnglandB. live with her auntC. meet EdmondD. visit a friend7. Before Edmond greeted her, Daisy felt ________.A. anxiousB. curiousC. relievedD. excited8. Edmond waited till everyone was gone before greeting Daisy because _______.A. he did not want to talk to a girl before othersB. he did not get Daisy s phon’e callC. he had never seen Daisy beforeD. he was looking for a middle-aged woman9. What did Edmond look like in Daisy s eyes’?A. An average 14-year-old.B. A lost dog.C. An old friend.D. A man with dignity.10. Daisy did not make any comment about Edmond smoking because _______.A. she knew all children in England smoke cigarettesB. she thought smoking did harm to one's healthC. the smoking age in England is about twelveD. she did not want to make a fool of herselfPassage threeToday people can use the phone to talk with others almost anywhere on the earth. But whenyou use the phone, you don ’t see the person you are talking with. That may change in the nearfuture.Today some people are using a kind of telephone called the picture phone or vision phone.With it, two people who are talking can see each other.Picture phones can be useful when you have something to show the person you ’re calling.They may have other uses in the future. One day you may be able to ring up a library and ask tosee a book.Then you’ll be able to read the book right over your picture phone. Or you may be able to goshopping through your picture phone. If you see something in the newspaper that you think youwant to buy, you ’ll go to your phone and call the shop. People at the shop will show you the thingyou ’re interested in right over the phone. You ’ll be able to shop all over town and never even leaveyour room!11. Today people can use the phone to talk with others _______.A. in all the townsB. in some places in the worldC. only in big citiesD. almost anywhere on the earth12. The word “i t n”the text means ________.A. the picture phoneB. any phoneC. the useD. the change13. We can _________ through the picture phone according to （根据）the text .A. write a bookB. do shoppingC. play gamesD. have classesPassage Four“It ’s over! Thank goodness! ”School was over and I was tired . I sat at the front of the school bus.Janie , the driver , tries to break the uncomfortable atmosphere （气氛）by striking the match oftalks . I try to listen politely, but usually I am too busy thinking about my day. On this day ,however , her talk was worth （值得）listening to .“My father ’s ill , ”she said to no one in pa（rti特c u别lar地）. I could see worry in her eyes .I had never seen her like this before. She always meets students with a smile.With a sudden change of interest, I asked, “What’s wrong with him? ”With her eyes wet and her voice unusual, she answered, “Heart trouble. ”Her eyes lowered asshe continued. “I ’a vl e r e ad y lost my mum, so I don’tthi n k I can stand losing him. ”cIouldn ’ tanswer. My heart ached for her.I sat on the seat thinking of the great pain （痛苦）my own mother was thrown into when herfather died . I saw how hard it was, and still is, for her. I wouldn ’t want anyone to go throug Suddenly I realized （意识到）Janie wasn’t only a bus driver , that was just her job . She hada whole world of family and cares too.I suddenly felt very selfish. I paid no attention to Janie because she was a bus driver. I hadjudged her by her job and brushed her off as unimportant.I shouldn ’t have been so selfish and se-cl f entered.Understanding people is an art.14. When the students get on the school bus , Janie usually ________.A. listens to musicB. talks about her own worryC. sits on her seat without wordsD. meets them with a smile15. In this passage the writer tries to tell us that ______.A. losing parents makes people sad and helplessB. understanding the people around us takes timeC. we should try to look deeper into the people around usD. it ’s not right to judge the people around us by their clothes答案1 2 3 4 5 6 7 8 9 10D B B A D B A C B D11 12 13 14 15D A B D C根据下列句子及所给汉语注释．在答题卡相应的位置上写出空缺处各单词的正确形式。
大学英语练习题2
大学英语练习题2Part I Listening ComprehensionSection ADirections: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said. Both theconversation and the question will be spoken only once. After eachquestion there will be a pause. During the pause, you must read the fourchoices marked a, b, c and d, and decide which is the best answer. Thenmark the corresponding letter on the Answer Sheet with a single linethrough the centre.1. a. 4:45 b. 5:15 c. 5:45 d. 8:452. a. She’s not hungry. b. She’s at the dentist’s.c. The food tastes like an old shoe.d. She’s in too much pain.3. a. $3.75 b. $3.25 c. $7.50 d. $15.004. a. The first hot dogs came from Germany.b. Hot dogs originated in the United States.c. Some hot dogs are made from reindeer meat.d. Even countries like Finland have a food similar to hot dogs.5. a. gas station b. police stationc. lost and found departmentd. bar6. a. Jason Daniels isn’t home right now.b. The caller dialed the wrong number.c. Jason Daniels can’t come to the phone right now.d. Jason Daniels doesn’t want to speak to the caller.7. a. She’s on a committee. b. She’s been working late.c. She exercises too muchd. She’s trying to budget her sleep.8. a. No, because it’s not for sale.b. Y es, because he has plenty of money.c. Yes, if he borrows the money from the woman.d. No, because he didn’t bring enough money.9. a. The bus has broken down and will not arrive.b. The bus was in a terrible accident.c. The bus will probably arrive at 9:15.d. The bus may arrive tonight, but the man isn’t sure.10. a. The train is crowded. b. The train is late.c. The train is empty.d. The train is on time.Section BDirections: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will bespoken only once. After you hear a question, you must choose the bestanswer from the four choices marked a, b, c and d. Then mark thecorresponding letter on the Answer Sheet with a single line through thecenter.Passage OneQuestions 11 to 13 are based on the passage you have just heard.11. a. Paris. b. Copenhagen. c. New Y ork. d. London.12. a. 1. b. 2. c. 3. d. Never.13. a. London and Paris. b. U.S.A.c. Paris.d. Paris and Copenhagen.Passage TwoQuestions 14 to 16 are based on the passage you have just heard.14. a. Declined. b. Depleted. c. Limited. d. Unlimited.15. a. Europe and Asia. b. The whole world.c. Asia and America.d. America.16. a. The resources of the sea were unlimited.b. The threats to Animals and Birds.c. Sea resources will continue as important food supplies.d. We must love fish.Passage ThreeQuestions 17 to 20 are based on the passage you have just heard.17. a. The care and proper selection of dogs for family pets.b. Different breeds of dogs.c. Responsibility for seeing that dogs are properly cared for.d. Different kinds of books about dogs.18. a. Children. b. Family. c. Parents. d. ASPCA.19. a. Because they are big and aggressive.b. They provide companionship as well as protection.c. Because most people are afraid of them.d. Because they are easy to train.20. a. When you have small children. b. When you live in an apartment.c. When space is limited. d. When you live in the city.Part II Vocabulary and StructureDirections: Each of the following sentences is provided with four choices. Choose the one that best completes the sentence. Then mark you answer byblackening the corresponding letter on the Answer Sheet.21. The attempt to stop the strike only ______ the workers’ resentment.a. weakenedb. fueledc. insuredd. strengthened22. Having been _______ built, the factory looked so ugly.a. heartilyb. harshlyc. hastilyd. harmoniously23. Lying in bed with both legs seriously injured, he felt unhappy and lonely, his only_________ was the friendship of Mrs. Everest, his beloved nurse.a. retreatb. rescuec. revived. refuge24. Don’t _______ your confidence by trusting that irresponsible man.a misplace b. mislay c. misbelieve d. mislead25. We can learn something from the Americans, but we shouldn’t be too naive tothink that everything in America can be __________.a. implantedb. transplantedc. transferredd. imbued26. Translation is generally classified into free translation and ______ translation.a. literateb. literaryc. literal c. literature27. ________ I think he likes being responsible for everything.a. in a senseb. in the wayc. in many sensesd. on the way28. Galileo ________ that objects of different weights fall at the same speed.a. suggestedb. opposedc. demonstratedd. supposed29. The government claims it has ________ all its difficulties from the previousadministration.a. developedb. inheritedc. transmittedd. won30. ____ something far more important than good English was needed in our contactwith foreigners, that is, a real understanding of culture.a. At a timeb. At one timec. At the timed. At times31. To err is ________, to forgive divine.a. humaneb. inhumanec. humand. inhuman32. The club will _________ members the first week in September.a. absorbb. enrollc. registerd. sign33. He was denied of the job because he was considered to be ________ for theposition.a. over-qualifiedb. over-confidentc. over-estimatedd. overwhelmed34. The problem requiring immediate solution will be given _______ at the meeting.a. priorityb. urgencyc. superiorityd. seniority35. I am happy to hear that your and you mother __________ enjoy a strong and closerelationship.a. initiallyb. currentlyc. promptlyd. previously36. In our factory, there are always enough engineers ______ hand to take care ofevery aspect of our production process.a. atb. inc. byd. on37. The ground is wet and the air is so fresh. It _____ last night.a. was rainingb. must have rainedc. might have rainedd. should rain38. ________ is usual in such bad weather, it is extremely difficult to find a taxi.a. Whenb. Soc. Asd. Like39. ______ by the appearance of a mouse, we promptly decided to clean our office.a. Startlingb. Having startledc. Startledd. To startle40. —“Eliot was not only a highly developed scholar but also a magnificent poet.”—“_________.”a. He so wasb. So was hec. Neither was hed. So he was41. The football player was __________ his abnormal behavior in the terminalcompetition because he drank to much before the game.a. responsible forb. punished sincec. blamed becaused. criticized because42. ________ in a recent science competition, the three students were awardedscholarships totaling $21000.a. To be judged the bestb. Having judged the bestc. Judged the bestd. Judging the best43. Many Asian-Americans resent _____ a “model minority”.a. to be labeledb. being labeledc. to labeld. for labeling44. The bookstore has decided to branch out ______ selling records and tapes.a. onb. toc. atd. into45. Once ______, the book became a bestseller.a. publishedb. publishingc. to publishd. was publishedPart III ClozeDirections: There are 20 blanks in the following passage. For each blank there are four choices marked a, b, c and d. Y ou should choose the ONE that bestfits into the passage. Then mark the corresponding letter on the AnswerSheet with a single line through the center.No one should be forced to wear a uniform under any circumstance. Uniforms are __46__ to the human spirit and totally __47__ in a democratic society. Uniforms tell the world that the person who wears one has no value as __48__ but only lives to function as a part of a whole. Those __49__ uniforms lose all their self worth.There are those who say that wearing a uniform gives a person sense of __50__ with a larger, more important concept. What could be more important than the individual himself? If an organization is so weak that it must __51__ cloth and buttons to inspire its members, that organization has __52__ reason to continue its existence. Others say that the __53__ of making people wear uniforms, __54__ in a school. removes all envy and competition in the matter of dress __55__ that a poor person who cannot __56__ good quality clothing need not be belittled(轻视) by a __57__ person who wears expensive, quality clothing. Those persons conveniently ignore __58__ critical concepts as freedom of choice, motivation, and individuality.Uniforms also __59__ the economy. Right now, billions of dollars are spent__60__ the fashion industry every year. Thousands of persons are __61__ in designing, creating, and marketing different types of clothing. The wearing of uniforms would destroy the fashion industry which __62__ would have an unfavorable effect on such industries as advertising and promotion. __63__ advertising, newspapers, magazines, and television would not be able to __64__ in business. Our entire information and entertainment industries would __65__.46. a. entertaining b. demandingc. charmingd. penetrating47. a. unnecessary b. unimportantc. irresponsibled. irrelevant48. a. an employee b. a staffc. a persond. an individual49. a. with b. under c. in d. on50. a. possession b. identificationc. involvementd. participation51. rely on b. turn out c. take off d. cope with52. a. enough b. every c. none d. no53. a. behavior b. conduct c. practice d. habit54. a. tell b. speak c. put d. say55. a. hence b. so c. however d. otherwise56. a. provide b. afford c. undergo d. show57. a. witty b. powerful c. wealthy d. competitive58. a. such b. many c. so d. all59. a. bruise b. hurt c. blow d. defeat60. a. in b. for c. on d. over61. a. applied b. utilized c. adopted d. employed62. a. after all b. by contrast c. on the contrary d. in turn63. a. Without b. Unless c. Except d. Against64. a. represent b. occupy c. remain d. preserve65. a destroy b. fail c. conflict d. hitsPart IV Reading ComprehensionDirections: There are 4 reading passages in this part. Each passage is following by some questions or unfinished statements. For each of them there are fourchoices marked a, b, c and d. Y ou should decide on the best choice andmark the corresponding letter on the Answer Sheet with a single linethrough the center.(1)On stage, the fingers of a 75-year-old jazz clarinetist(单簧管演奏者) move quickly and lightly along his instrument, recalling complicated musical passages learned over a lifetime. Offstage, he can never remember where he put his car keys.The mystery of how someone’s memory could perform so well in one situation and so poorly in another puzzled earlier generations of researchers. But today’s viewof this complex mechanism provides a simple answer, and that is the brain uses different processes to store up and get back different kinds of information.This realization has produced new insight into the relationship between aging and memory loss. In fact, while most studies indicate that a decline in many types of memory is to be expected, some aspects of memory actually show improvement well into the 70s. A better understanding of what is a normal result of aging can greatly reduce the fear common among older people and those close to them that memory lapses(失误) may mean the beginning of severe disorders.Old people need to realize that it is perfectly normal for certain types of memory ability to decline with age and that these changes are not generally predictive(预测的) of a serious problem. In fact, only about 5% of those over 65 suffer from serious memory disorders. The good news is that unless you are a jet fighter pilo t, the types of memory declines that come with growing older don’t matter much. Memory training, reducing distractions, writing things down and keeping everyday items like eyeglasses and keys in the same place can be helpful strategies.66. The example cited in the first paragraph indicates that _______.a.musical passages are learned over a lifetimeb.aging invariably results in poor memoryc.old people have better memory on stage than offstaged.the performance of one’s memory varies in different situations67. People now believe that in the course of storing up and getting back differentinformation, _______.a.different brain processes are involvedb.the relationship between aging and memory loss is foundc. a decline in memory is expectedd. a complex mechanism is made simpler68. According to the passage, when a person reaches his 70s_________.a.he will inevitably suffer from severe physical disordersb.he is most likely to suffer from serious memory disordersc.some aspects of his memory even take a turn for the betterd.all types of his memory are expected to decline69. According to the passage, older people usually regard memory lapse as _______.a. the result of growing oldb. the result of a lack of memory trainingc. the beginning of severe disordersd. a sign of total loss of memory70. Which of the following is not mentioned as a useful way to help old peopleremember things?a. Putting things in order.b. Receiving musical training.c. Practicing mental concentration.d. Making notes.(2)Time spent in a bookshop can be most enjoyable, whether you are a book-lover or merely there to buy a book as a present. The desire to pick up a book with an attractive paper cover is irresistible, although this method of selection ought not to be followed, as you might end up with a rather dull book. And you have to be careful not to be attracted by the variety of books in a bookshop. It is very easy to enter the shoplooking for a book on, say, ancient coins and to come out carrying a copy of the latest best-selling novel and perhaps a book on gardening—something which had only vaguely interested you up till then.The main attraction of a bookshop is, I think, the opportunity to escape the realities of everyday life. There are not many places where it is possible to do this. A music shop is very much like a bookshop. Y ou can wander round such places to your heart’s content. If it is a good shop, no assistant will approach you with the inevitable greeting. “Can I help you, sir?” Y ou needn’t buy anything you don’t want. In a bookshop an assistant should remain in the background until you have finished browsing(浏览). Then, only then, are his services necessary. Of course, you may want to find out where a particular section is, but when he has led you there, the assistant should retire and look as if he is not interested in selling a single book.Book-sellers must be both kind and patient. There is a story which well illustrates this. A medical student had to read a text-book which was far too expensive for him to buy. Every afternoon, he would go to the shop and read a little of the book at a time. One day, however, he was dismayed to find the book missing from its usual place and was about to leave when he noticed the owner of the shop waving to him. Expecting to be told off, he went towards him. To his surprise, the owner pointed to the book, which was tucked away in a comer. “I put it there in case anyone was tempted to buy it,” he said, and left the delighted student to continue his reading.71. According to the author, a book with an attractive paper cover might turn out______.a. informativeb. quite boringc. irresistibled. most enjoyable72. Y ou may enter a bookshop with a book on ancient coins in your mind, but comeout carrying a book on gardening. This is because _______.a.Y ou buy it on the recommendation of the bookshop assistantb.Y ou find it interesting after you have finished browsing through itc.Y ou can hardly resist the temptation of the variety of books thered.Y ou are not careful enough in selecting what you really need73. According to the passage, in a good bookshop, ________.a.your heart is contentedb.you feel that you are in a music shopc.the assistant greets you in a friendly wayd.the assistant offers his help only when necessary74. The medical student was surprised because ______.a.he saw the owner of the shop waving to himb.owner of the shop wasn’t angry with him at allc.the book was missing from its usual placed.the owner hid the book in case he was tempted to buy it75. Which of the following is NOT true according to the passage?a.The bookshop assistant should help you only when he leads you to aparticular section.b.Time spent in a bookshop can be very pleasant whether you are a book-loveror not.c.In a good book shop you don’t need to buy anything you don’t want.d.The owner of the bookshop is very kind and helpful.(3)Insomnia, the most common sleep complaint, is the feeling of not having slept well or long enough. Short-term insomnia, lasting up to three weeks, may result from anxiety, nervousness, and physical and mental tension. Long-term insomnia is often brought on by poor health conditions, chronic drug or alcohol use, excessive use of beverage containing caffeine and abuse of sleeping pills.Insomnia is a complex problem, not given to simple solutions. Regular exercise tends to benefit sleep; however, vigorous(剧烈的) exercise especially just before sleep can arouse a person and delay sleep. Daytime naps tend to disrupt normal night-time sleep. If you nap regularly and sleep poorly at night, your night-time sleep might improve if you skip the naps. Naps should not be used as a substitute for poor sleep at night.If hunger keeps you awake, a light snack might help you sleep, unless it causes problems with digestion. Avoid heavy meals, alcohol, and caffeine beverages. For those who can tolerate milk, a cup of warm or hot milk drink may work best.All sleeping medications should be used sparingly, for the shortest possible time and in the smallest effective dose. Although temporarily helpful, sleep-promoting medications can eventually cause disturbed sleep, side effects and dependence on the drug.The effect of alcohol is deceiving. It may induce(诱发) sleep, but chances are it will be fragmented sleep. The sleeper will probably wake up in the middle of the night when the alcohol’s relaxing effect wears off. Alcohol may also lead to thirst and a dry throat which can wake you up.The best way to sleep better is to keep a regular schedule for sleeping. A regular bedtime and wake-up time help to solidify the biological rhythms that establish your periods of peak efficiency during the 24-hour day. If you can’t fall asleep, don’ stay in bed worrying about being awake. Leave the room. Read, sew, watch TV, take a warm bath, or find some way to relax. Go to bed only when you are sleepy.76. What is the most effective solution to insomnia according to the passage?a.Regular exercises before bedtime.b. A fixed schedule for sleeping.c. A light snack with a cup of milk drink.d. A small dose of sleeping medications.77. The author does not recommend alcohol in that _______.a.It does not help sleeping at allb.It may make a person addicted to itc.It brings problems with digestiond.It may disturb a person’s sleep when its78. The word “skip” is closes t in meaning to _____.a. cope withb. yield toc. give upd. stick at79. Which of the following statements is true according to the author?a.The best time to go to bed is when you feel sleepy.b.Vigorous exercise before bed-time tends to benefit sleep.c.Long time drug use may lead to insomnia lasting for as long as three weeks.d.Though a complex problem, insomnia can easily be solved.80. The best title for this passage is __________.a.Insomnia—the Most Common Sleep Problemb.Practical Advice on Restful Sleepc.How to Keep a Regular Schedule for Sleepingd.Ways to Establish Periods of Peak Efficiency(4)In a competitive economy, the consumer usually has the choice of several different brands of the same product. Y et underneath their labels, these products are often nearly identical. Thus, manufacturers are confronted with a problem—how to keep sales high enough to stay in business. Manufacturers solve this problem by advertising. Through advertising, each manufacturing company tries to convince consumers that its product is special. To do this, the company tries to appeal to consumers in various ways. In fact, advertisements may be classified into three types according to the kind of appeals they use.One type of advertisement tries to appeal to the consumer’s reasoning mind. It may offer a claim that seems scientific. For example, it may say that dentists recommend Flash toothpaste, or it may declare that Woof dog food contains a special, vitamin-rich ingredient known as K-9. In selling a product, the truth of advertising may be less important than the appearance of truth. A scientific approach gives the appearance of truth.Another type of advertisement tries to amuse the potential buyer. Products that are essentially boring, such as cleaning powder, are often advertised in an amusing manner. One way of doing this is to make the products appear alive. The advertiser may draw little cartoon eyes, arms, and legs on the cans of cleaning powder and have the resulting figures scrub the sink. Advertisers believe that consumers are likely to remember and buy products that they associate with fun.Associating the product with something pleasant is the technique of the third type of appeal. In this class are ads that suggest that the product will satisfy some basic human desires, like the desire to be admired by other people. this appeal is sometimes strengthened by hiring a famous person to endorse the product. Seeing the famous person, the consumer is supposed to reason thus: Everyone admires Judson Smith the great football star. Therefore, if I use Buckworthy bank traveler’s check, everyone will admire me too.One only needs to look through a magazine or watch an hour of TV in order to see examples of these three different advertising strategies.81. According to the passage, manufacturers turn to advertising because they want to______.a.provide truthful and scientific information about their productsb.spread the message that their products are, though expensive, worth themoneyc.promote their product sales to stay in business in a competitive economyd.present to consumers a wide selection of different brands of the same product82. The scientific approach of advertising appeal aims to ________.a.impress consumers by offering seemingly scientific proofb.make known to consumers the ingredients of the products advertisedc.mislead consumers by making false claimsd.offer experts’ judgment of the products advertised83. Judging from the context, the word “endorse” most probably means ________.a.demonstrate various brands of a productb.say that one uses and approves of a productc.express doubt on the quality of a productd.explain the function of a product84. Which of the following is NOT true according to the passage?a. One manufacturer’s toothpaste tends to differ very littl e from anothermanufacturer’s.b. Advertised amusingly, boring products are likely to appeal to customers.c. Sometimes in selling a product, the truth of advertising is not considered mostimportant.d. Consumers are hardly influenced by famous persons due to their reasoningmind.85. The best title of this passage could be ________.a. Ways to Push Salesb. Useful Advertising Techniquesc. Approaches to Market Expandingd. How to Survive a Competitive EconomyPart V Translation1.作者认为从长远的观点来看，过早的成功对一个人的全面成长是有害的。
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马老师练习2
1．有一列长800米的火车从上海开往南京，速度为每秒钟40米，这时一只小鸟从车尾飞出，以每秒钟60米的速度向火车头飞去，在小鸟碰到火车头时立即掉头飞回车尾。
小鸟共飞了多长时间？
（相遇及追及问题）
2．五个空瓶可以换一瓶汽水（带瓶）。
某班同学共喝了161瓶汽水，其中一些是喝剩的空瓶换的，那么他们至少买了汽水多少瓶？
3．一批钢材，小卡车装载要用45辆；如果用大卡车装载，要用36辆，每辆小卡车比每辆大卡车少装4吨。
这批钢材有多少吨？
（假设法）
4．有一个整数，它除381余1，除286余1，除210也余1，这个整数是多少？
5．一个自然数可以分解为三个质因数的积，如果三个质因数的平方和是7950，这个自然数是多少？。