1练习

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练习1

练习1第一章1．什么是操作系统2．什么是多道程序设计技术？多道程序设计技术的特点是什么？3．简述并发与并行的区别4．设内存中有三道程序A、B、C。

他们按的优先顺序执行。

他们的计算和I/O操作的时间如图表所示（单位：ms）假设三道程序使用相同设备进行I/O操作，即程序以串行方式使用设备，试画出单道运行和多道运行的时间关系图（调度程序的执行时间忽略不计）。

在两种情况下，完成这三道程序各要花多少时间？第二章第一节1．进程与线程的主要区别是什么？2．什么是PCB，它的作用？3．进程与程序的主要区别？4．已知一个求值公式（A2+3B）/(B+5A)。

若A、B已赋值，试画出该公式求值过程的前趋图。

5．某系统的进程状态转换图如图，请说明1）引起各种状态转换的典型事件有哪些？2）当我们观察系统中某些进程时，能够看到某一进程产生的一次状态转换能引起另一进程作一次状态转换，。

在什么情况下，当一个进程发生转换3时能立即引起另一进程发生转换1。

3）试说明是否会发生下述因果转换：2→1 3→2 4→1第二节1．下图为四个进程合作完成某一任务的前趋图，说明这四个进程间的同步关系，并用P、V操作描述它。

2．设有n各进程共享一个程序段，对如下两种情况：1）如果每次只允许一个进程进入该程序段2）如果每次最多允许m（m<n）个进程同时进入该程序段试问：所采用的信号量初值是否相同？信号量值的变化范围如何？3．有一单向行使的的公路桥，每次只允许一辆汽车通过。

当汽车到达桥头时，若桥上无车，便可上桥；否则需等待，直到桥上的汽车下桥为止。

若每一辆汽车为一个进程，请用P、V操作保证汽车按要求过桥。

第三节1．假定有一个信箱可以存放N封信，当信箱不满时，发信这可把信件送入信箱，当信箱性信时，收信者可从信箱中取信。

用指针R、K分别表示可存信和取信的位置，请用管程来管理这个信箱，是发信者和收信者能正确的工作。

2．一个理发店由一个有n张椅子的等候室和一个放有一张理发椅的理发室组成。

练习1---彭宝源牙髓病学作业

牙髓病学练习一一、名词解释（共5题，每题4分，共20分）1、牙髓牙本质复合体：牙髓和牙本质在胚胎发生上联系很密切，对外界刺激的应答有相互效应，是一个生物整体，被称为牙髓牙本质复合体。

2、摄菌效应：受过损伤或病变的组织能将血流中的细菌吸收到自身所在的部位，这种现象称为引菌作用。

3、半抗原作用：在根管治疗时，长期反复使用某种药物，结果不理想甚至使根尖周病变加重，或在根管内封上某种药物后立即引起疼痛反应，这种现象称为半抗原现象。

4、闸门控制学说：脊髓灰质区胶质中有闸门装置，控制传入冲动向中枢传递，闸门开放，冲动可以通过；闸门关闭，冲动不能通过，同时大脑中枢也可向下传出冲动。

5、膜泡：细菌毒性产物和酶的集合载体，毒性强，体积小，易透过微小屏障，导致深层组织破坏，是牙髓炎不易自行修复、牙周炎病程长的重要原因。

牙髓卟啉单胞菌可产生膜泡，该菌存在于感染根管内。

二、问答题(共8题，每题10分，共80分)1、牙髓组织血液循环的特点及临床意义?牙髓的血液来源于上、下牙槽动脉。

动脉经根尖孔进入牙髓后，在牙髓中央区向冠部行走，沿途向周边发出分支，从小动脉到微动脉，最后形成毛细血管。

多根牙在髓室内有丰富的血管吻合，但来源于副根冠的交通血管不足或缺乏。

①外界刺激敏感，缺少侧枝循环②牙髓感染时免疫防御能力有限③病变产物不易运出④不利于牙髓组织修复2、闸门控制学说的原理及临床意义？外周粗纤维传递触觉和压觉，主支至中枢传递细胞T细胞，侧支中一支至SG细胞，一支上行至高级中枢；外周细纤维传递痛觉，主支支T细胞，侧支至SG细胞；SG细胞发出轴突至T细胞区，在外周传入纤维到达T细胞前与之形成抑制性突触，即闸门；T细胞接受外周传入纤维冲动并向中枢系统传入，引起痛觉；粗纤维冲动兴奋SG细胞，使后者抑制T细胞，闸门关闭；粗纤维通过高级中枢下行传出冲动，调节闸门系统；细纤维冲动抑制SG细胞，使后者不能抑制T细胞，闸门开放；细纤维冲动超过粗纤维冲动，SG细胞抑制，闸门开放，T细胞激活，冲动传入中枢，产生痛觉；按摩可兴奋粗纤维，使闸门关闭，减轻疼痛；3、微生物感染牙髓的途径有哪些?（1）牙髓暴露（2）牙本质小管（3）牙周袋途径牙周袋内细菌可经暴露的侧支根管或根尖孔进入牙髓，引起逆行性牙髓炎；（4）血源感染摄菌作用（5）邻牙根尖周感染扩散牙齿牙髓炎或外伤，而邻牙有根尖周感染时，感染区微生物可通过血流/淋巴系统、物理扩散或压力扩散到邻牙牙髓中。

c语言练习1

练习1一、选择题1、一个C程序是由（B）。

A．一个主程序和若干子程序组成B．一个或多个函数组成C．若干过程组成D．若干子程序组成2、一个C程序的执行是从（ A ）。

A．main函数开始，直到main函数结束B．第一个函数开始，直到最后一个函数结束C．第一个语句开始，直到最后一个语句结束D．main函数开始，直到最后一个函数结束3、C语言语句的结束符是（B）。

A．回车符B．分号C．句号D．逗号4、下面标识符中（ D ）不是C语言的关键字。

A．char B．goto C．case D．include5、以下说法正确的是（A）A．C程序的注释可以出现在程序的任何位置，它对程序的编译和运行不起任何作用。

B．C程序的注释只能是一行。

C．C程序的注释不能是中文文字信息。

D．C程序的注释中存在的错误会被编译器检查出来。

6、以下说法正确的是（D）A．C程序中的所有标识符都必须小写B．C程序中关键字必须小写，其他标识符不区分大小写C．C程序中所有标识符都不区分大小写D．C程序中关键字必须小写，其他标识符区分大小写。

7、设x、y均为float型变量，则以下不合法的赋值语句是（B）A．++x ; B．y=(x%2)/10 ; C．x*=y+8; D．x=y=0 ;解析：运算符%要求两端的操作数必须为整型，而在答案B中%号两端的操作数为x和2，x为实型，所以是错误的。

8、下列不正确的转义字符是（C）A．' \\ ' B．' \' ' C．' \19 ' D．' \0 '解析：转义字符是由单引号括起来的带反斜线的字符，这些字符具有特殊的含义，反斜线后可以是数字来代表某个字符，而这些数字只包括两种：八进制（1-3位）和十六进制（1-2位）。

十六进制前面要加x（或X），这里的C答案反斜线后是数字，但不是x开头，所以应该是八进制数，但是数值里有9，和八进制数不符，所以是错误的。

给排水 ——管道——练习1

0.744×9.91=7.37 0.744×11.40=8.48
已知：本工程主材的价格信息如下：
主材名称镀锌钢管DN15 镀锌钢管接头零件DN15 镀锌钢管DN20
镀锌钢管接头零件DN20
镀锌钢管DN15
镀锌钢管接头零件DN15
单位 m 个 m
个
m
个
主材单价 6.8 1.29 8.86
2.00
13.15
④ +⑥
×
②
⑤
【答案】
清单计价法计算安装费
清单使用说明根据GB50856-2013《通用安装工程工
程量计算规范》K.1的规定，给排水管道工程量清单项目设置、项目特征描述的内容、计量单位及工程量计算规则应按表 4.1执行。
【解答】
【第一步】编制分部分项工程量清单
根据GB50856-2013《通用安装工程工程量计算规范》K.1的规定
计算清单项目合价 ——填写分部分项工程量清单与计价表
序项目编项目号码名称
项目特征描述
计量工单位程
12 管（螺纹连
（55%+32%）
接）DN15
=148.94
10-113
室管接内（）【D镀螺N锌纹注20钢连意10】m 这250里.98的17材9.12料69费.72 只2.是14 辅1（7材595.1%费2+×32。%）综合
=155.83
10-1- 室内单镀锌价钢中10需m 要304包.01括21主5.37材83费.59 。5.05
1.00×2+3.30=5.30
2.00+0.24+2.00+[2.0
m
0-(-1.20)]=7.44

有机化学练习1

2. 化合物C5H8，能与1摩尔H2加成，若用KMnO4氧化，只生成一种产物，则该化合物的可能结构为：
A . CH2=CH-CH2CH=CH2
D.
CH=CH2
B.
Байду номын сангаас
CH2
C.
E. CH3CH2CH=CHCH3
3. 烷烃C5H12中一个1°H被氯原子取代后的产物共有种。 A. 5 B. 3 C. 4 D. 6 E. 7
CH=CH2 CH2CH3
B. E.
C.
CH=CH2
D.
CH=CH2
15. 化合物
①
CH3 C-Br CH3
②
Br
Br
④
CH2Br
③
C(CH3)2
CHCH3
按SN1反应历程从快到慢的排列顺序为： A. ②＞③＞④＞① B. ③＞④＞②＞① C. ①＞②＞③＞④ D. ①＞③＞④＞② E. ②＞①＞④＞③
COOH
4
CH3CHOH CH3
卢卢卢试试
CH3CHCH3
Cl
CN
5.
+ CH3CH2Cl
无水 AlCl 3
不反应
6. CH =CH-CH CH + Br 2 2 3 2
NaCl / H2O
CH2BrCHBrCH2CH3+ CH2BrCHClCH2CH3
7.
+ KMnO4 /H
HOOCCH2CH2CH2CH2COOH
16. CH 16.（CH3）3C⊕稳定的原因是因为结构中存在： A. p－π共轭 B. +I效应 C. σ－p超共轭 D. A和C E. B和C
1
2
3

广州教科版六年级英语上册 Unit 1 练习题(含答案)

广州教科版六年级英语上册Unit 1 练习题一、选择题。

1．Tom is one of the Chinese ___________ in our school.A. boyB. boysC. boiesD. boyes 2．My mother is ___________ TV.A. looking atB. seeingC. readingD. watching 3．— ___________ you ___________ a book?— Yes, I am.A. Do, readB. Are, readC. Are, readingD. Are, looking 4．A cat has four ___________, doesn't it?A. footsB. footC. feetsD. feet5．___________ you ___________ Japan?A. Is; comeB. Are; come fromC. Do; come fromD. is; come from 6．They are cutting grass to ___________ the horses.A. feedsB. feedC. feedingD. fed 7．There are three ___________ and five ___________ in the room.A. American, JapaneseB. Americans, JapaneseC. American, JapaneseD. Americans, Japaneses8．Listen! The boy ___________.A. cryingB. is cryingC. criesD. crys 9．Don’t talk here. Grandparents ___________.A. sleepB. is sleepingC. are sleepingD. sleeps10．I saw many ___________ in the street.A. peoplesB. peopleC. people’sD. peoples’11．The green sweater is his ___________.A. brotheresB. brothersC. brother’sD. brother 12．Is the woman ___________ yellow your teacher?A. inB. putting onC. wearingD. having 13．Look! The twins ___________ their mother do the housework.A. are wantingB. helpC. are helpingD. are looking 14．___________ are the birds doing? They are singing in a tree.A. WhoB. WhatC. HowD. Where 15．Can you see nine ___________ in the picture?A. sheepsB. bookC. horseD. fish 16．The ___________ has two ___________.A. boy; watchB. boy; watchesC. boys; watchD. boy; watchs 17．The ___________ are flying back to their country.A. GermanyB. GermanysC. GermansD. Germen 18．The girl brushes her ___________ every day before she goes to bed.A. toothsB. teethC. teethsD. teethes 19．My uncle has three ___________.A. childB. childsC. childrenD. childrens 20．Kate ___________, the others ___________.A. sing, listenB. is singing, is listeningC. sing, are listeningD. is singing, are listening21．I ___________ my eraser, but I can’t ___________ it.A. look for, findingB. am finding, look forC. am looking for, findD. find, look for22．Who ___________ over there now?A. singingB. are singC. is singingD. sings23．It’s nine ten. The students ___________ a music class.A. haveB. havingC. are havingD. has24．I am ___________ America.A. comeB. come fromC. comesD. from 25．Do you have ______ books?A. any otherB. other anyC. anythingD. any others二、用所给词的适当形式填空。

微积分练习1

C.非奇非偶函数
函数奇, 偶性定义 : 1.若对任意x, 恒有f ( x) = f ( x), 则称f ( x)为偶函数.
2.若对任意x, 恒有f ( x) = f ( x), 则称f ( x)为奇函数.
解: 设f ( x) = x sin x, 则 f ( x) = ( x) sin( x) = ( x)( sin x) = x sin x = f ( x)
说明 : 函数的间断点一般是使分母为0的点.
解 : 令x + 1 = 0 x = 1
导数基本公式
(1) ( 2) (3) ( 4) (5) ( 6) (7 ) (8) (9 ) (10 ) (c )' = 0 (c为常数 ) (α为任意实数 ) ( a > 0, a ≠ 1) ( a > 0, a ≠ 1) ( x α ) ' = α xα 1 ( a x ) ' = a x ln a (e x ) ' = e x (log a x ) ' = 1 x ln a
2
ax + bx+ c < 0
2
(a, b, c均为常数且a > 0) , x > x2或 x < x1 x <x<x
1
2
( x位于两根之外 )
( x位于两根之内)
堂上练习: 1 1 函数f ( x) = , 的定义域是 (2,3) U (3,+∞) . ln( x 2) 1 2, 函数f ( x) = + 5 x的定义域是 ( 1,0 ) U (0,5] . ln( x + 1)
x →0 x →0
.
B .2
C.1
D .0

学术英语理工 Unit1 练习答案

2 这可以指获取计算机系统的存储内容，获得一个系统的处理能力，或捕获系统之间正在交流的信息。
3 那些系统开发者或操作者所忽视的不为人知的漏洞很可能是由于糟糕的设计造成的，也可能是为了让系统具备一些必要的功能而导致计划外的结果。
Unit 1 Choosing a Topic
1 Deciding on a topic
Enhancing your academic language
Translate the following sentences from Text 1 into Chinese.
4 另一种是预先设定好程序对特定易受攻击对象进行攻击，然而，这种攻击是以鸟枪式的方式发出的，没有任何具体目标，目的是攻击到尽可能多的潜在目标。
When it comes to cloud computing, it is often worried that cloud
computing is not reliable, the worries ranging from (从……到) “I lose control over the system with cloud computing” to “My files are not secure with cloud computing”. Actually the worries arise from some misunderstandings (来自于对……误解) of cloud computing. Although the security of cloud computing _le_a_v_e_s_a__lo_t_o_f_p_r_o_b_le_m__s_u_n_s_o_lv_e_d__(留下很多问题没有得到解决), it opens a path for (打开了通道) the future development of computers. Hence a better understanding of a new technology (需要有新的思想)___re_q_u_i_re_s__a_d_if_fe_r_e_n_t_f_ra_m__e_o_f_m__in_d___.

练习1

练习1—会计要素、复式记账一、单项选择题1．资产、负债和所有者权益是资金运动的（）。

A．存在形态 B．动态表现 C．静态表现 D．形成来源2．负债指过去的交易、事项形成的现时义务，履行该义务预期会导致（）流出企业。

A．货币资金 B．资产或劳务 C．财产 D．经济利益3．费用是指企业为销售商品（）等日常活动所发生的经济利益流出企业A．生产成本 B．支出耗费 C．提供劳务 D．发生损失4．（）是指与产品生产无直接关系，属于经营管理过程中发生的，不计入产品成本，而直接计入当期损益的费用。

A．制造成本 B．制造费用 C．费用 D．期间费用5．（）是对会计对象的具体内容进行科学分类的项目。

A.会计要素B.会计科目C.会计对象D.会计账户6.我国企业会计准则规定:作为会计要素的收入，是企业在销售商品或提供劳务等经营交易与事项中实现的（）。

A.营业收入B.投资收益C.全部收入D.营业收入和营业外收入7.引起资产和负债同时减少的经济交易与事项是（）A.以银行存款购入材料一批B.以银行借款偿还应付账款C.将现金存入银行D.以银行存款偿还银行借款8．某企业月初资产总额1000万，负债总额200万，本月发生以下交易与事项：（1）向银行借款100万元存入银行，（2）用银行存款偿还应付账款50万元。

则月末所有者权益总额为（）。

A．900万 B．800万 C．850万 D．115万9．下列经济交易与事项中，影响会计等式总额发生变化的是( )A.以银行存款50000元购买材料B.结转完工产品成本40000元C.购买机器设备20000元，货款未付D.收回客户所欠的货款30000元10．某企业采购员预借差旅费,所引起的变动为（）A．一项资产增加,一项负债增加 B．一项资产增加,别一项资产减少C．一项资产减少,一项负债减少 D．一项负债增加,另一项负债减少11．以下各项目属于会计科目的有（）A．欠供应单位料款B．所有者投资C．银行存款D．未实现利润12．对会计要素进行分类核算的工具是（）A．会计科目B．账户C．会计科目和账户D．会计科目或账户13．会计科目是（）A．会计报表的名称B．会计账户的名称C．会计账簿的名称D．会计要素的名称14．每一项经济业务的发生，都会影响（）账户发生增减变化。

跨境电子商务师练习1

跨境电子商务师练习11. Amazon内部选品Bestseller会显示多少卖家？（） [单选题] *TOP30TOP120TOP50TOP100(正确答案)2. Amazon内部选品方法有（） [单选题] *数据分析工具供应商资源Bestseller(正确答案)本土网站3. Instagram属于以下哪家公司？（） [单选题] *Facebook(正确答案)GoogleAmazonMicrosoft4. Tiktok在海外市场的用户主要集中在以下哪个年龄段？（） [单选题] * 16-24岁(正确答案)25-34岁35-44岁44岁以上5. YouTube属于以下哪个公司旗下？（） [单选题] *FacebookGoogle(正确答案)AmazonBaidu6. 产品退货或损坏导致无法销售，产品信息会在FBA库存界面中什么位置显示？（） [单选题] *reservedinboundunfulfillable(正确答案)Fulfillable7. 产品线的选择受以下哪项影响最大？（） [单选题] *竞争环境市场容量发展趋势供应链资源(正确答案)8. 对于Amazon收取的佣金来说错误的是？（） [单选题] *所有品类佣金都一样(正确答案)佣金有最低的限额不同品类对应着不同的佣金Amazon自营品牌佣金最高9. 飞轮理论是以下哪个平台的运营原则？（） [单选题] * AliExpressWishAmazon(正确答案)EBay10. 公司受益人数量再填写的时候一定要做到（） [单选题] *只填写实际受益人个数与真实股东数量相符(正确答案)尽量少填写股东人数多多益善，多添人数11. 关于FBA，以下错误的说法是（） [单选题] *是fulfillment是Amazon配送物流是免费的(正确答案)要收取响应的仓租，配送等费用12. 关于FBA操作中的注意事项，以下正确的说法是（） [单选题] *易燃易爆品不能入仓(正确答案)产品listing的包装重量和体积可以不精确货件的包装无需显示made一个产品可以有多个FBA产品标签13. 关于产品条码，下列说法正确的是（） [单选题] *每个产品只能有一个条码(正确答案)产品上可以有其他种类的条码不用贴条码同一个条码不得超过两个14. 关于卖家店铺在Amazon上的描述错误的是（） [单选题] *可以看到卖家的名称可以上传产品用户可以访问可以随意装修(正确答案)15. 关于AliExpress发布新产品,以下描述正确的是（） [单选题] *产品属性要填写完整,专业(正确答案)只要关键词设置了,标题中没有也是没关系的产品的类目可以在推荐的3个类目中随便选一个产品图片要越大越好16. 关于Amazon，bullet point可以填写几条？（） [单选题] *4568(正确答案)17. 关于Amazon，以下换行的HTML代码正确的是（） [单选题] *内容 (正确答案) 内容 加粗 内容《br》18. 关于Amazon，以下加粗的HTML代码正确的是（） [单选题] *加粗(正确答案)加粗加粗加粗19. 关于Amazon平台，以下错误的说法是（） [单选题] * Amazon平台是美国，德国，日本等欧美发达国家体量最大的平台Amazon平台以巴西、俄罗斯等新兴市场国家为主要市场(正确答案) Amazon平台的主流客户群体是中产阶级Amazon平台的平均利润率最高20. 关于Amazon佣金的说法正确的是（） [单选题] *所有商品佣金是相同的不同品类对应的佣金不同(正确答案)Kindle周边产品佣金较低商品如果价格过低可以不收取佣金21. 关于Amazon专业卖家账号，以下错误的说法是（） [单选题] *自注册，成功率低必须是企业属于第三方卖家级别必须是个人(正确答案)22. 国外电商打折力度最大的时间为（） [单选题] *光棍节母亲节黑色星期五(正确答案)新年23. 金砖5国是指哪5个国家？（） [单选题] *中国、印度、俄罗斯、南非、巴西(正确答案)中国、印尼、俄罗斯、南非、巴西中国、欧洲、美国、德国、法国中国、泰国、俄罗斯、日本、巴西24. 经数据分析Amazon使用人群大概年龄为（） [单选题] * 18-45岁(正确答案)年轻人群年龄多样化高龄人群25. 跨境电商中“客单价”是指什么？（） [单选题] *在一段时间内，每个客户平均购买的订单金额(正确答案)在一段时间的广告投放期内，广告总花费除以引入客户数，得出平均每个客户的引入成本在一段时间的广告投放期内，广告总花费除以成交客户数，得出平均每个成交客户的花费成本在一段时间内，平均每天成交的订单数量26. 骗子在盗取邮箱的惯用手法不包括（） [单选题] *修改邮箱后台设置，设置自动转发功能伪造虚假身份(正确答案)发布钓鱼链接等待至付款阶段，屏蔽双方正常来往，仿冒与买家或者卖家相近的邮箱，诱导付款或者发货27. 如果在图片处理软件中对一张照片进行添加水印，那么此操作的主要目的是（） [单选题] *可以有效防止被同行盗用(正确答案)让图片可以打开更快促进客户下订单可以使图片更加漂亮28. 如下关于俄罗斯市场相关内容描述错误的是（） [单选题] *俄罗斯人很注重仪表，很爱干净俄罗斯客人的询盘最大的特色就是俄式英语俄罗斯人喜饮伏特加在俄罗斯上网费用较贵(正确答案)29. 如下关于俄罗斯市场相关内容描述错误的是（） [单选题] *俄罗斯消费者对商品的选择要求较高，具有严格的挑剔性俄罗斯消费者喜欢追逐名牌，即使价格较贵，人们也愿意购买对俄罗斯市场必须建立质量第一的关键与俄罗斯客户进行商务谈判通常速度会非常快(正确答案)30. AliExpress，未经权利人许可使用他人商标的情况，以下表述不正确的是（）[单选题] *首次违规扣0分首次违规扣2分(正确答案)每次重复违规扣6分累达48分者关闭账号31. AliExpress平台流量的最大来源是（） [单选题] *中国俄罗斯(正确答案)韩国西班牙32. AliExpress开店，以下哪一项不是必要条件？（） [单选题] *企业营业执照和商标企业支付宝100款产品图片(正确答案)保证金33. AliExpress卖家后台“运费模板”位于（） [单选题] *产品信息搜索诊断模板(正确答案)发布产品34. AliExpress卖家可以在后台哪个位置设置橱窗推荐？（） [单选题] *营销活动营销分组商品管理(正确答案)商品分组35. Amazon公司成立初期主要经营的品类是什么？（） [单选题] *生活用品电器文具图书(正确答案)36. AliExpress平台放款规则中，一般情况下订单的放款时间是以下哪项？（） [单选题] *订单发货后15天确认收货后15天(正确答案)确认收货后30天订单发货后3-5天37. AliExpress平台上，设置产品分组的目的是什么？（） [单选题] *关联营销增加流量设置捆绑销售增加销量设置店铺产品类目方便用户浏览(正确答案)方便管理和编辑产品信息38. AliExpress平台上，账号申请退出经营且无其他违规行为的前提下，保证金多久可以解冻？（） [单选题] *即时退还7天15天30天(正确答案)39. 品牌持有者，商品图片能否印有公司品牌Logo水印?（） [单选题] *可以，打击侵权的有效手段。

ASPEN Plus 应用基础_练习1

“ASPEN Plus 应用基础”练习一目的：1、练习用Aspen Plus进行流程仿真的基本步骤；2、自学掌握物流分割模块FSplit的用法；3、体会物性计算方法对仿真结果可靠性的重要性；4、学习Pump、Pipe、Pipeline的用法；5、学习设计指标（Design Specification）的用法。

内容：1、建立以下过程的Aspen Plus仿真模型：1)将1000 m3/hr的低浓酒精（乙醇30%w，水70%w，30°C，1 bar ）与700 m3/hr的高浓酒精（乙醇95%w，水5%w，20°C，1.5 bar）混合；2)将混合后物流平均分为三股；3)一股直接输出；4)第二股与600 kg/hr的甲醇溶液（甲醇98%w，水2%w，20°C，1.2 bar）混合后输出；5)第三股与200 kg/hr的正丙醇溶液（正丙醇90%w，水10%w，30°C，1.2 bar）混合后输出。

求：三股输出物流的组成（摩尔分率与质量分率）和流量（摩尔流量及体积流量）分别是多少？2、进行以下过程的仿真分析：1）将400 °C，3 bar下的1000 m3/hr水蒸气、1000 m3/hr二氧化碳和1000 m3/hr 甲醇等压混合，求混合气体的温度和体积流量。

2）将400 °C，30 bar下的1000 m3/hr水蒸气、1000 m3/hr二氧化碳和1000 m3/hr 甲醇等压混合，求混合气体的温度和体积流量。

3）将400 °C，300 bar下的1000 m3/hr水蒸气、1000 m3/hr二氧化碳和1000 m3/hr 甲醇等压混合，求混合气体的温度和体积流量。

在物性方法及模型（Property methods & models）设定中分别选用理想气体状态方程（Ideal）、Benedict-Webb-Rubin-Lee-Starling状态方程（BWR-LS）、Peng-Robinson 状态方程（Peng-Rob）、Redlik-Kwong-Soave状态方程（RK-Soave）作为基本方法（Base method）进行以上计算，比较各方法所得的结果有何不同，将结果汇总编辑为MS-Word文档。

2020学年【冀教版】九年级英语全册配套：Unit1同步练习(含答案)

2020学年冀教版英语精品资料Unit1 Stay Healthy一、单项选择1. Annie has a , and she is going to see her dentist today.A. coldB. feverC. coughD. toothache2. Would you like to talk with ?A. GermanB. GermansC. GermenD. Germens3. Smoking is to people's health. Most smokers have suffered from lung diseases.A. usefulB. helpfulC. beautifulD. harmful4. you have a chance to speak English, you should take it.A. HoweverB. WhateverC. WheneverD. Whichever5. Linda to go to the cinema with us, although she was free last night.A. promisedB. refusedC. agreedD. decided6. --- Look, is dancing under the tree.--- Oh, that's my cousin, Anna.A. everybodyB. anybodyC. nobodyD. somebody7. --- Whose Iphone 5 is this?--- It's not . I think it's .A. mine; herB. mine; hersC. my; herD. my; hers8. --- I'll go to the museum this afternoon, so I can't go swimming with you.--- .A. It's my pleasureB. You're welcomeC. That's a pityD. Don't mention it9. Look up and you can see stars in the sky at night.A. millionB. three millionsC. million ofD. millions of10. an illness, she could not move her left leg.A. As resultB. As a result ofC. ResultD. The result11. She answer questions in class, because she is afraid of mistakes.A. doesn't dare; to makeB. doesn't dare; makeC. dare not; to makeD. dare not; making12. --- Lisa, we need to clean the kitchen. Could you the trash?--- Yes, sure.A. take afterB. take offC. take placeD. take out13. --- Susan, what are the advantages of MP5 players?--- Mom, they are smaller and lighter they can be carried very easily.A. unlessB. ifC. untilD. so that14. --- How to be a good English learner?--- You read English for about half an hour in the morning.A. shouldn'tB. shouldC. don'tD. do15. A lot of people will help you, so you worry about the money.A. can'tB. needn'tC. mustn'tD. couldn't二、完形填空A new study has showed the importance of exercise for teenage girls. Scientists studied the information from a study made in Shanghai on 75,000 16 aged from 40 to 70. The teamfound that women who often 17 as a teenager were healthier than those who didn't.The scientists said that teenage girls who did almost 80 minutes exercise a week had a 16 percent lower risk of 18 from illnesses. This percentage(百分比) went down to 13 for women who exercised more than 80 minutes a week as teenagers. They said that women would usually live 19 if they did just15 minutes of exercise a day in their teens.Head scientist Dr. Sarah Nechuta said that 20 women in their twenties, thirties and forties did notgo out to work, doing exercise as teens would help 21 live longer. She said, "Whether they are adultsor 22 , as for women, they can take lower risks of illnesses if they take part in exercise."She added, "Our study shows the 23 of starting exercising from teenager time. It helps teenagers take part in exercising so that they can take 24 risks of illnesses and live longer in their later life." Dr. Nechuta said that although the study 25 the information on women in China, the advantage of exercising during the teen years could be helpful to all women anywhere in the world.16. A. women B. men C. girls D. boys17. A. studied B. worked C. exercised D. played18. A. coming B. dying C. stopping D. leaving19. A. nearer B. closer C. shorter D. longer20. A. so that B. even if C. as soon as D. as for21. A. them B. it C. her D. him22. A. boys B. gills C. teenagers D. men23. A. difficulty B. illness C. health D. importance24. A. lower B. longer C. richer D. poorer25. A. asked for B. depended on C. waited for D. taken out三、阅读理解AFor many people the subject of hiccups(嗝) is a joke, but for Harry Mendes, a fifteen-year-old schoolboy from Birmingham, it was something quite different.His hiccups began one Sunday lunch time and continued day and night for two weeks. After the first week, Harry's parents took him to hospital, but it took another week for the doctors to cure his attack.Harry, who is now back at school, described what happened to him.“When I began to hiccup, I drank a glass of water but that didn't do any good. That evening I had hiccups every four seconds. We tried everything to stop them. I held my breath and drank cold drinks. Myfather even tried to give me a shock but that didn't work either.”After a week of sleepless nights, he went to hospital. The doctors took an X-ray of his chest but they couldn't find anything wrong.“They gave me some medicine and my hiccups slowed down, but it was another week before the medicine worked completely and my hiccups stoppe d.”Harry was very lucky. The world record holder is the American farmer Charles Osborne, who hiccupped for sixty-eight years. He stopped in 1990 at last, but nobody knows why.26. Harry's hiccups lasted .A. a weekB. fourteen daysC. twenty-eight daysD. one month27. His hiccups started after he .A. drank a glass of waterB. went to hospitalC. ate an Indian mealD. finished his homework28. His parents decided to take him to hospital when he .A. hiccupped for four secondsB. held his breathC. hiccupped at nightD. couldn't stop hiccupping29. His hiccups completely stopped one week after the doctor .A. gave him some medicineB. took an X-ray of his chestC. gave him a shockD. let him drink cold drinks30. What does “shock” in this passage mean?A. 震惊B. 休克C. 喷嚏D. 哈欠BScientists have learned a lot about the kinds of food people need. They say that there are several kindsof food that people should eat every day. They are: ①green and yellow vegetables of all kinds; ②citrus(柑桔) fruits and tomatoes; ③potatoes and other fruits and vegetables; ④meat of all kinds, fish and eggs;⑤milk and foods made from milk; ⑥bread or cereal(谷物), rice is also in this kind of food; ⑦butter, or something like butter.People in different places of the world eat different kinds of things. Foods are cooked and eaten in many different kinds of ways. People in different countries eat at different times of the day. In some places people eat once or twice a day; in other countries people eat three or four times. Scientists say that none ofthe differences is really important. It doesn't matter whether foods are eaten raw or cooked. It doesn't matterif a person eats dinner at 4 o'clock in the afternoon or at 11 o'clock at night. The important thing is whatyou eat every day.There are two problems, then, in feeding the large number of people on earth. The first is to find some ways to feed the world's population so that no one is hungry. The second is to make sure that people everywhere have the right kinds of food to make them grow to be strong and healthy.31. From the first paragraph we know noodles belong to a kind of food.A. vegetableB. fruitC. meatD. cereal32. According to the scientists, which of the following groups is the healthiest for your lunch?A. Chicken, apples, cereal, cabbages.B. Potatoes, rice, bread, carrots.C. Oranges, bananas, fish, tomatoes.D. Beef, pork, fish, milk.33. People in different places of the world .A. have the right kinds of food to eatB. cook their food in the same wayC. have their meals at the same timeD. eat food in different ways34. Which of the following is NOT true?A. People in some places don't have enough to eat.B. There are too many people in the world.C. One of the problems is that no one is hungry.D. The scientists are trying to make people grow to be strong and healthy.35. If there is Paragraph 4, what do you think is going to be talked about?A. When people eat their meals.B. What to do with the two problems.C. How to cook food in different ways.D. Why people in different places eat different kinds of food.CMany of us don't pay attention to the importance of eye care. It's said that if you take care of your body, then you can be healthy. That is why our eyes should be given a lot of care. Natural eye care shouldbe put in a number one place.There are several causes leading to poor eyesight like not enough food, gene(基因) and aging(年龄增长). Televisions, computers and reading are also the causes of having poor eyesight.If you happen to work in front of the computer, it is best to take a rest every once in a while. Something dirty can cause redness and they will make you feel uncomfortable. It is bad for your eyes, too.If this happens, the best way is to clean your eyes by using cold water. You must also try your best to protect your eyes from harmful thing. For example, sunglasses are not just fashion but they can also serveas a great way to protect your eyesight from UV rays.Eating healthy foods will do good to your eyesight. Remember that vitamins(维生素) A、C and E are good for eyes. Try to eat food groups that have these vitamins. And you should do eye exercises because exercise protects your eyesight, too. If a person exercises regularly(规律地) and eats the right kind of food, his eyes will stay in good condition for a long time.All above are natural ways of eye care that help us keep healthy eyes. Being happy all the time can be helpful to a person's eyesight, too. In a word, eye care is very important, no matter how old a person is.36. is the most important way to protect our eyes.A. Natural eye careB. Taking medicineC. Seeing the doctorD. Being happy all the time37. All the following causes can lead to bad eyesight except .A. ageB. heightC. readingD. computer38. What should you do if you have to work in front of the computer?A. Eat healthy foods.B. Clean the eyes by using cold water.C. Wear a pair of sunglasses.D. Have a rest after working for a while.39. What do the under words "UV rays" mean?A. 沙土.B. 闪电.C. 紫外线.D. 超声波.40. Which is the best title of the passage?A. Ways of Eye CareB. Ways of Eye ExercisesC. Way of Being HappyD. Way of Being Healthy四、单词拼写(单句首字母填空)41. What's your t number? It's 555-0192.42. --- What are you doing?--- I am studying for the English e .43. I had a p in my head last night, but now I feel better.44. I beg your p because I have no idea about your words.45. If you support us, please c for our team.五、单词拼写(根据中文提示拼写单词)46. The old man looked a bit (苍白) than usual after the operation.47. A list of 100 good books for teenagers came out. Books on history and science are all (包括).48. It will be a dangerous trip. Are you sure you want to take the (风险)?49. Miss Weston is having difficulty in (控制) the children in that class.50. Don't smoke in a (公共的) place.六、翻译(根据中文提示完成句子)51. 我的医生说我发烧了。

练习1 简单句基本句型-高一英语(牛津译林版2020)(解析版)

练习1 简单句的基本句型划分下列简单句的成分，并写出是什么句型。

1.All my efforts will pay off.【答案】(All my) efforts will pay off. “主+谓”句型【解析】此句是“主谓”结构句型。

pay off在此句中意为“取得成效”，是不及物动词短语。

all my修饰efforts 作定语，efforts为主语。

2.Senior high school is a time of learning and discovering.【答案】(Senior high) school is a time (of learning and discovering). “主+系（谓）+表”句型【解析】此句是“主+系（谓）+表”结构。

senior high作school的定语。

is是系动词，其后的a time是表语，构成“系表结构”。

of learning and discovering修饰a time，是介词短语作定语成分。

3.All roads lead to Rome.【答案】(All) roads lead to Rome. “主+谓+宾”句型【解析】此句是“主谓宾”结构。

lead是谓语动词，to在此处为介词，Rome跟在介词to后作宾语。

（此句说一句谚语，意为“条条大道通罗马”。

）4.Jack offered me some helpful advice.【答案】Jack offered me (some helpful) advice. “主+谓+双宾”句型【解析】此句是“主谓双宾（间接宾语+直接宾语）”结构。

此句中offer是谓语动词。

me和some helpful advice 都是offer动作的对象，因此都是宾语成分。

通常人为间接宾语（此句中的me），物是直接宾语（此句中的advice）。

5.Setting goals makes you more confident.【答案】Setting goals makes you more confident. “主+谓+宾+宾补”句型【解析】此句为“主+谓+宾+宾补”句型。

练习1

练习1.11．（4）对任意集合A,B和C，下列判断中正确的是（A）A．若A∈B,B含与C，则A属于CB．若A属于B，B含于C，则A含于C C．若a含于b，b俗语c，则a属于c D．若a含于b，b属于c，则a含于c （7）下列各式中错误的是（B）A.空集含与空集B．空集属于空集C．空集含与空集集合D．空集属于空集集合7.(1)空集含与空集（对）（2）空集属于空集（错）（3）空集属于{空集} （对）（4）空集含与{空集} （对）1.21（6）设A=空集，B={空集，{空集}}，则B\A 是（C）A.{{空集}}B.{空集} C．{空集，{空集}} D.空集（7）设A={a，{a}}，下列哪一个为错（B）A.{a}属于ρ（A）B.{a}含与ρ（A）C.{{a}}属于ρ（A）D.{{a}}含与ρ（A）（8）幂集ρ（ρ（ρ（空集）））是（C）A.{{空集}，{空集，{空集}}}B.{空集，{空集}，{空集，{空集}}}C．{空集，{空集}，{{空集}}，{空集，{空集}}} D.{空集，{空集，{空集}}}2（5）设A={{x,y},空集，x,y},求下列各式的结果A\{x，y}={{x,y},空集}；A\{空集}={{x,y}x,y}；{x,y}\A=空集;空集\A=空集;幂集ρ（A）={空集，{{x,y}}, {空集}, {x}, {y}, {{x,y},空集}, {{x,y},x}, {{x,y},y}, {空集,x},{空集,y},{x,y}, {{x,y},空集,x},{{x,y},空集,y},{{x,y},x,y },{ 空集,x,y }, {{x,y},空集,x,y } }(7)确定以下各式<1>空集∩{空集}=空集<2>{空集，{空集}}\空集={空集，{空集}}<3>{空集，{空集}}\{空集}={{空集}}11.（2）C={空集，{空集}}∩c=空集∪c={空集}（3）C={{a}，{b}，{a，b}}∩c=空集∪c={a,b}2.2练习题8．证明：在加利福尼亚州（人口2500万）至少有4个人的性的前3个字母相同，并且他们的生日相同。

北师大版高一英语必修一Unit1单元练习题

北师大版高一英语必修一Unit1单元练习题Ⅰ.用适当的介、副词填空1.I use English ________ school and practise ________ home.2.I have a pen friend who writes ________ me in English.3.What are your attitudes ________ using English?4.I like watching the English news ________ CCTV Channel 4 every evening.5.I always write ________ important new words.Ⅱ.佳句翻译与仿写1.How long have you been learning English?翻译：________________________________________________________________________ ________________________________________________________________________ 仿写：你在上海呆了多久?________________________________________________________________________ ________________________________________________________________________ 2.The more mistakes I make，the more I learn.翻译：________________________________________________________________________ ________________________________________________________________________ 仿写：你听英语听的越多，你会感到越简单。

练习1

练习1 -ed 分词Choose an appropriate word from the words in brackets:1.(Drunken, Drunk, Drinking, Drunk) people are not allowed to drive a car.2.I have (shaven, shaved ) myself ; with a (well-shaved, well-shaven ) face I’ll lookmuch younger than I actually am .I always keep my ( shaving, shaved, shaven) things in a special case.3.The match is lit. It’s a (lighting, lighted, lit) match.4.The old man has (sunk, sunken) cheeks. His cheeks have (sunk, sunken) in.5.They were on the New York express, (binding, bound, bounden) for Mai.Complete the sentence by using the –ing or the –ed participle from of the verb in brackets:6.Will you﹍(increase) salary enable you to buy a new car?7.One should always be careful with﹍(load) guns.8.There is a﹍(refresh) breeze on the porch.9.The﹍(pay) servants had their﹍(specify) position in the household.10.The roses grew in great﹍(perfume) masses all over the garden.Put the verbs in brackets into infinitive, the –ing participle or the –ed participle:11.He soon had them all﹍(laugh).12.Just get them﹍(finish up) as soon as possible.13.Can you get the clock﹍(go) again?14.The lecturer soon got us﹍(think).15.You may take the horse to the water, but you can not make him﹍(drink).16.This hotel leaves much﹍(desire).17.7.I felt a great weight﹍(take off) my mind by this promise.18.Suddenly we felt the atmosphere﹍(grow) tense.19.She must have seen a great hope﹍(spring up) before her.20.10.I saw the man﹍(knock down) and the driver﹍(drive) away.练习2 -ING 分词Put the verbs in brackets into the correct forms, choosing the –ing participle and the infinitive:1.He was in low spirits and even considered ____ (go) away.2.You must endeavor ____ (explain) yourself more clearly; it is impossible ____(understand) what you are trying ____ （say）.3.He didn’t feel like ____（work）, so he suggested ____ (spend) the day in thegarden.4.The doctor advised ____ (stay) longer in hospital.5.We all appreciate your ____ (want) ____ （help）us in our difficulties.6.Michael always defers ____ （do）his homework till the last moment.7.Sam gave me ____ （understand）that he was angry.8.You can’t miss ____ （see）the statue on your way to the bank.9.You shouldn’t delay ____ （make）a decision about how you are going to spendyour holiday.10.A : Would you children mind ____ （keep）quiet for a moment？I’m trying____ （fill）up a form.B: It’s no use ____ （ask）children ____ （keep）quiet. They can’t help ____ （make） a noise.Replace the words in italics by an infinitive or an -ing construction：11.The police hope that they will solve the crime soon.12.The defeated champion swore that he would have his revenge.13.The accused admitted that he had received the stolen goods.14.Do you anticipate that there will be any real problem in getting support?15.I vowed that I would never follow his advice again.16.Closing the factory means that people will lose their jobs.Fill in the blanks with "preposition+-ing participle of the verb" in brackets.17.The prisoner was surprised_____(admit) his guilt.18.We talked her_____(marry) that awful chap.19.Bad weather discouraged us _____(go) on a picnic.20.He fooled himself _____(believe) that he was contributing to mankind.21.Nobody could accuse Tom_____(drive) without due care and attention.22.Don't let all those television advertisements brainwash you_____(buy) that soap.23.She tried to talk her husband____(go).24.As he was a professional, he was disqualified_____(take）part in the OlympicGames.25.John allowed himself to be dissuaded_____(take up) a post overseas.26.Dad tricked Mother______(believe) he had forgotten her birthday.Put the verbs in brackets into the –ing participle or the infinitive:27.Most people prefer _____ (spend) money to _____(earn) it.28.I love ____(lie) on my back and ____(stare) at the sky.29.Our teacher has promised____(help) us ____(prepare) for the examinations whichhe has put off ____ (hold) till next week.30.I was beginning ____ (get) angry.Keys:1.Drunken 2.shaved, well-shaven, shaving ,3.lighted4.sunken, sunk 5.bound6. increased7.loaded8.refreshing9.paid, ughing12.to finish up13.going14.thinking15.drink16.to be desired17.taken off18.grow19.to springup20.knocked down, drivingKeys:1.going2.to explain , to understand, to say3.working ,spending4.staying5.wanting ,o help6.doing 7.to understand 8.seeing 9.making 10.keeping , to fill , asking , to keep, making 11.to solve12.to have13.receiving / having received14.there being15.never to follow 16.putting people out of work17.into admitting18.out of marrying19.from going20.into believing21.about starting22.into buying23.out of going24.from talking25.from taking up26.into believing27.spending, earning28.lying/to lie, staring/to stare29.to help , prepare, holding30.to get31.to understand32.working, to age, lose33.to risk, getting34.to tell35.you wanting, to help, to practise, doing 36.him to start, tell37.a. He ought to be shoot first.b. He deserves to be the first who will shoot.38.a. I told you that David stole the money and regret having done so.b. I have to tellyou that David stole the money, and I’m sorry I must do so39.a. I cannot butapologi ze. b. I can’t help him to apologize for his wrongdoing.40.He is to study mathematics. 其它搭配：makes me study ; lets me study ; had better study41.He is learning to play chess. 其它搭配：knows how to play; spends time playing ;would rather play42.I long to ski through the forest. 其它搭配：am looking forward to skiing ; enjoyskiing ; imagine myself skiing。