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2020新译林版新教材高中英语必修一unit2第二单元课文及翻译（附课本练习答案）

2020新译林版新教材⾼中英语必修⼀unit2第⼆单元课⽂及翻译（附课本练习答案）Book 1 Unit 2ReadingWhen teenagers’ bodies and minds go through a period of rapid development, every part of their lives can be influenced. The magazine article below is about teenagers’ relationships with their parents. Before you read the article, think about the following questions:What physical and mental changes do you experience as you become a teenager How do you deal with themWhat do you think “strangers under the same roof” meansStrangers under the same roof?Does every dinner with your parents seem to turn into a battle? Have your once warm and open conversations become cold and guarded? Do you feel that you just cannot see eye to eye with them on anything? You are not alone. Heated arguments and cold silences are common between teenagers and their parents.Teenagers’ physical changes may result in such family tensions. You may feel anxious that you are developing at a different rate to your friends, shooting up in height or getting left far behind. You might worry about your changing voice, weight problems or spots. When it all gets too much, your parents are often the first targets of your anger.It can be a big headache to balance your developing mental needs too. You enter a strange middle ground— 5 10 15 Reading 17 no longer a small child but not quite an adult. You have both a new desire for independence and a continued need for your parents’ love and support. You feel ready to be more responsible and make decisions on your own. Unfortunately, your parents do not always agree and that makes you feel unhappy. “Why can’t they just let me go?” you may wonder. On the other hand, when you are struggling to control your feelings, you wish they could be more caring and patient —sometimes they forget that growing up is a rough ride. It can be difficult when your parents treat you like a child but expect you to act like an adult. All of this can lead to a breakdown in your relationship.Although sometimes it may seem impossible to get along as a family, you can take action to improve the situation. The key to keeping the peace is regular and honest communication. When you disagree with your parents, take a minute to calm down and try to understand the situation from their point of view. Perhaps they have experienced something similar and do not want you to go through the same pain. After you have thought it through, explain your actions and feelings calmly, listencarefully, and address their concerns. Through this kind of healthy discussion, youwill learn when to back down and when to ask your parents to relax their control.Just remember that it is completely normal to struggle with the stress thatparent-child tensions create, and that you and your parents can work together to improve your relationship. The good news is that this stormy period will not last. Everything will turn out all right in the end, and the changes and challenges of your teenage years will prepare you for adulthood.Extended readingRead the short story about a mother’s love for her children.Mama and her bank accountEvery Saturday night Mama would sit down by the kitchen table and count out the money Papa had brought home.“For the rent.” Mama would count out the big silver pieces.“For the groceries.” Another group of coins.“I’ll need a notebook.” That would be my sister Christine, my brother Nels or me.Mama would put one or two coins to the side. We would watch with anxious interest. At last, Papa would ask, “Is that all?”And when Mama nodded, we could relax a little. Mama would look up and smile, “Good. We do not have to go to the Bank.”We were all so proud of Mama’s Bank Account. It gave us such a warm, secure feeling.When Nels graduated from grammar school, he wanted to go on to high school. “It will cost a little money,” he said.Eagerly we gathered around the table. I took down a box and laid it carefully in front of Mama. This was the “Little Bank”. It was used for sudden emergencies, such as the time when Christine broke her arm and had to be taken to a doctor.Nels listed the costs of the things he would need. Mama counted out the money in the Little Bank. There was not enough.“We do not want to go to the Bank,” she reminded. We all shook our heads.“I will work in Dillon’s grocery after school,” Nels volunteered.Mama gave him a bright smile and wrote down a number. “That’s not enough,” Papa said. Then he took his pipe out of his mouth and looked at it for a long time. “I will give up smoking,” he said suddenly.Mama reached across the table and touched Papa’s arm. Then she wrote down another figure.“I will look after the Elvington children every Friday night,” I said. “Christine can help me.”Now there was enough money. We all felt very good because we did not have to go downtown and draw money out of Mama’s Bank Account. So many things came out of the Little Bank that year: Christine’s dress for the school play, my little sister Dagmar’s operation ... Whatever happened, we always knew we still had the Bank to depend upon.That was twenty years ago.Last year I sold my first story. When the check came, I hurried over to Mama’s and put it in her lap. “For you,” I said, “to put in your Bank Account.”I noticed for the first time how old Mama and Papa looked. Papa seemed shorter, and Mama’s hair was silver now.“Tomorrow,” I told Mama, “you must take it to the Bank.”“You will go with me, Katrin?”“That won’t be necessary. Just hand it to the teller. He’ll pay it into your account.” Mama looked at me. “There is no account,”she said. “In all my life, I’ve never been inside a bank.”And when I didn’t—couldn’t—answer, Mama said seriously, “It is not good for little ones to be afraid—to not feel secure.”(Adapted from Kathryn Forbes’s Mama’s Bank Account, which has 17 short stories and describes the struggles and dreams of a family in San Francisco in the early 1900s)TranslationUnit 2Reading最熟悉的陌⽣⼈?每天的家庭晚餐幻化成激烈战⽃？热情开朗的谈话蜕变成冷淡警惕？⽆论什么事情都夏⾍语冰？其实⼤家都⼀样。

第二章 2.2 2.2.1 第2课时对数的运算

log27
=
−
1 2
×
4
−
1 2
log23
+
3 2
+
1 2
log23
=
−2
+
3 2
=
−对数的运算
M 目标导航 UBIAODAOHANG
Z 知识梳理 HISHI SHULI
题型一题型二题型三题型四
Z重难聚焦 HONGNAN JVJIAO
D典例透析 IANLI TOUXI
(2)原式=2lg 5+2lg 2+lg 5×(1+lg 2)+(lg 2)2
2 49 3
(2)2log32-log3
32 9
+
log38
−
5lo
g53.
解:(1)(方法一)原式 = 1 (5lg 2-2lg 7)− 4 × 3 lg 2+ 1 (2lg 7+lg 5)
2
32
2
=
5 2
lg
2-lg
7-2lg
2+lg
7+
1 2
lg
5
= 1 lg 2+ 1 lg 5= 1 (lg 2+lg 5)
=
lo g18 (5×9) lo g18 (2×18)
=
log185 + log189 log182 + log1818
=
1
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+ �� log18 2
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OKBridge 风格二盖一叫牌体系

2NT
3NT 对同伴的简单加叫
对同伴低花的简单加叫
跳叫支持同伴花色
应叫者 2NT 跳叫 3NT 再叫新花再加叫开叫者的花色
再应叫含义 12-14 或者 18-19 大牌点，在未叫的花色中有止张。如果是 18-19 点，可以在开叫者做成局止叫后继续邀请满贯(1 -2 -2 -2NT-3NT-4NT)，开叫者应首先假设应叫者是 12-14 大牌点 15-17 大牌点，旁套有止张，如果失配可以是不平均牌型自然，4＋张套，在将牌已经配合的情况下，可以是扣叫见下面的详细论述应叫者再加叫开叫者花色

1 -(2 )-2 是邀叫 1 -(2 )-3 ! 是进局逼叫
在应叫者首轮 PASS 的情况下，其二盖一叫牌等同于《美国标准叫牌法》 (SAYC) 中的含义(好套，不逼叫)，但唯一的例外就是对处于第三位置开叫的 1 或 1 的 2 应叫，这就是反式德鲁利约定叫。说明:跳叫新花不在我们讨论之列:我们所说的二盖一是非跳叫地在 2 阶叫出新花色，跳叫新花依然表达他原有的意义(同《美国标准叫牌法》里一样):
1
进局逼叫，开叫者和应叫者在达到成局定约前都不得停叫!2 应叫承诺 5 张以上，2 PASS 2 !/2 !/2 ! 任何阶低花应叫一般承诺有 4 张(甚至 3 张低花，特定的 3-4-3-3 的牌型)，2NT!是雅各贝约定叫。进局逼叫，或者给敌方定约施以惩罚性加倍，因为是二盖一，不能让敌方打未加倍的定约，所以对敌方叫品的 PASS 是让同伴作惩罚性加倍或盖叫。
1
PASS
2 !
3
1 1 1
2 1 1
2 /2 2 /2 2 !
任何承诺有 10 个以上大牌点，不是进局逼叫任何承诺有 10 个以上大牌点，不是进局逼叫 ? 弱跳新花，6 张以上，0-6 个大牌点，止叫；不是进局逼叫

适合一二年级上的兴趣班

1、英语：有条件1-2岁就开始亲近英语，3岁后就可以正规的学习了。

因为孩子再大的话，母语习惯已形成，再学外语就有语音干扰了。

2、画画：一般四岁开始正规学习比较好，这时候孩子上了一年幼儿园也能坐的住了。

不过要注意这么小的孩子学画画就是涂鸦探索，锻炼孩子的想象力和创造力，父母千万不要让孩子学习简笔画，会毁了孩子的创造力的。

3、书法：孩子学习书法的最佳年龄是小学三年级，因为书法毕竟是一种技巧性很高的艺术，太小的孩子学习是有难度的，孩子三年级后汉字已经学了很多，也基本适应了文化学习，所以这个时候最合适。

4、游泳：考虑到安全因素，一般都建议孩子在4-5岁之间开始学习比较好。

5、舞蹈：3-4岁可以上舞蹈兴趣班，5岁后可以学一些基本功，5-7岁就可以学一些高难度的动作，比如做劈腿、下弯腰等。

猫爸女儿基本也是按这个顺序学的。

综合英语教程1-Unit2-part2

Language Points of Para.1-2
1.a negative adverb, when it is put at the beginning of a sentence, the sentence should be partially inverted Similar words: no, not, never, seldom, little, hardly, at no time, in no way, not until, not only…but also, hardly/scarcely…when, No sooner… than …
Text Analysis
Para.1-2 Questions: 1. In which aspect are American homes different from traditional Chinese home? 2. What are the differences introduced in these paragraphs?
Para.3-4 Questions: 1. As for the interior arrangement, what are American homes and Chinese homes like respectively? 2. What are the cultural differences reflected?
T 5. Rarely did young children in Chinese families have their own private spaces in the house. T 6. In a traditional Chinese house in the north of China, people tend to rank the importance of the rooms in their houses according to their distance from the kitchen-dining room. F 7. Because of the differences in houses, Americans and Chinese have different views towards the idea of privacy and individual rights.

解析铁道行业标准《钢轨》第1和第2部分

2021年5月（总第415期）·8·标准化工作STANDARDIZATION WORK第49卷Vol.49第5期No.5铁道技术监督RAILWAY QUALITY CONTROL收稿日期：2021-01-29作者简介：高俊莉，副研究员；吴伟，高级工程师；朱洁琳，助理研究员1概述TB/T 2344（所有部分）《钢轨》是保障钢轨性能和质量的通用技术要求，为钢轨设计、制造、采购、验收、检验提供技术依据。

标准分为3个部分，即TB/T 2344.1—2020《钢轨第1部分：43kg/m ～75kg/m 》，TB/T 2344.2—2020《钢轨第2部分：道岔用非对称断面钢轨》，TB/T 2344.3—2018《钢轨第3部分：异型钢轨》。

TB/T 2344.1—2020适用于铁路用热轧和在线热处理钢轨；TB/T 2344.2—2020适用于铁路道岔及伸缩调节器用热轧和热处理非对称断面钢轨；TB/T 2344.3—2018适用于对称断面钢轨跟部锻造成型的异型钢轨和由非对称断面钢轨跟部锻造成型部位的制造及检验。

2020年12月，国家铁路局发布TB/T 2344.1—2020和TB/T 2344.2—2020（以下统称“新标准”）。

介绍3个部分标准历次版本发布情况、新标准修订原则和修订过程、主要修订内容及关键技术的确定。

2标准历次版本发布情况TB/T 2344.1—2020及其所代替文件历次版本发布情况如下。

1993年，发布TB/T 2344—1993《43kg/m ～75kg/m 钢轨供货技术要求》、TB/T 2341.1—1993《43kg/m 钢轨型式尺寸》、TB/T 2341.2—1993《50kg/m 钢轨型式尺寸》、TB/T 2341.3—1993《60kg/m 钢轨型式尺寸》和TB/T 2341.4—1993《75kg/m 钢轨型式尺寸》。

2003年完成第1次修订，修订TB/T 2344—1993，并入了TB/T 2341.1—1993，TB/T 2341.2—1993，TB/T 2341.3—1993和TB/T 2341.4—1993的内容，形成TB/T 2344—2003《43kg/m ～75kg/m 钢轨订货技术条件》。

第二章-矩阵(历年真题+答案)

D.
【解析】答案：B 【选择】【201610】【2 分】3.设 n 阶矩阵 A,B,C 满足 ABC=E,则 -1 -1 -1 A.A =B C B.A-1= C-1B-1 C.B-1=CA D.B-1=AC 【解析】答案：C 【填空】【201610】【2 分】
【解析】答案：-1 【填空】【201610】【2 分】
【解析】解：C2=ATBATB= AT(BAT)B=ATEB= ATB
2 1 1 C =A B= 0 0 0 2 1 1
2 T
【填空】【201610】【2 分】
0 1 0 1 4 3 -1 -1 【解析】解析：P= ,求得：P = ，则 P AP= 。 1 0 1 0 2 1
1 0 0 1 0 0 P 0 1 0 ， Q= 0 0 1 2 0 1 0 1 0
使得 PA=B,BQ=E,即 PAQ=E
1 0 0 1 0 0 1 0 0 所以 A=P-1EQ-1=P-1Q-1= 0 1 0 0 0 1 = 0 0 1 -2 0 1 0 1 0 -2 1 0
足等式 AX B X ，求 X .
【解析】
（提示：另一种简便解法为：此题(A-E）X=B 的形式；构造分块矩阵（ A-E,B ）分块矩阵进行初等行变换后变为（ E , X ）即可求出
3 2 1 1 0 0 1 0 0 3 2 1 3 2 1 ， A E,B 2 1 0 2 1 0 0 1 0 4 3 2 故 X= -4 -3 -2 ） 1 0 0 3 2 1 0 0 1 0 0 1 0 0 1

羊水亲子鉴定中STR基因座D5S818二步突变1例

短串联重复序列(short tandem repeats,STR)是人类的一类重要遗传标记,因其多态性丰富,扩增片断长度短,广泛地应用于亲子鉴定中。

但是,STR 基因座在遗传的过程中发生突变的概率较高,因此在鉴定过程中是个不容忽视的问题,要值得注意。

笔者在工作中遇一例较罕见的母亲发生二步突变的羊水检材鉴定,现报道如下。

1 案例资料1.1 案情简介李某(孕17周+),自然受孕,未确定腹中胎儿父亲是否为其老公,特委托本鉴定所鉴定是否存在亲子关系。

1.2 检验方法胎儿羊水5m l 、男方带毛囊毛发2根、女方血样备用。

采用Chelex-100 法分别提取DNA。

经PowerPlex R21 (普洛麦格生物技术有限公司)、AGCU EX22(无锡中德美联生物技术有限公司)复合扩增系统以及Investigator Argus RX-12(德国QIAGEN公司)扩增系统进行扩增,扩增产物在ABI3500型DNA测序仪上电泳,由GeneMapper ID X1.3软件进行结果分析。

2 结果2.1 22个常染色体STR 基因座分型结果同时应用PowerPlex R21和AGCU EX22复合扩增系统,胎儿与孕妇在D5S818位点的分型结果一致,不符合遗传规律。

结果见表1。

2.2 12个位点X-STR 基因座分型结果分析12位点X-STR基因座检测结果,胎儿的X-STR分型均能从孕妇及可疑父的分型中找到来源,符合X染色体遗传规律,结果见表2。

2.3 STR 亲权指数,累计亲权指数及亲权概率的计算亲权指数(paternity index,PI)、累积亲权指数(cumulative paternity index,CPI)及相对父权概率(relative chance of paternity,RCP)的计算按文献报道的方法计算,计算所使用的相关等位基因分布频率数据来自文献［1-2］和司法部司法鉴定科学技术研究所2014年亲权鉴定能力验证资料中的相关数据,以及无锡中德美联生物技术有限公司所提供的频率表。

运筹学自测试卷2

运筹学自测试卷2一、单项选择题1使用人工变量法求解极大化的线性规划问题时，当所有的检验数0j ,但在基变量中仍含有非零的人工变量，表明该线性规划问题 ( D )A ．有唯一的最优解B ．有无穷多最优解C ．为无界解D ．无可行解2当线性规划的可行解集合非空时一定（ D ） A.包含原点 B.有界 C ．无界 D.是凸集3线性规划具有多重最优解是指（ B ） A.目标函数系数与某约束系数对应成比例。

B ．最优表中存在非基变量的检验数为零。

C ．可行解集合无界。

D ．存在基变量等于零。

4使用人工变量法求解极大化线性规划问题时，当所有的检验数0j σ≤，在基变量中仍含有非零的人工变量，表明该线性规划问题（ C ）A. 有唯一的最优解；B. 有无穷多个最优解；C . 无可行解；D. 为无界解5在产销平衡运输问题中，设产地为m 个，销地为n 个，那么基可行解中非零变量的个数（ A ）A . 不能大于(m+n -1)； B. 不能小于(m+n -1)； C. 等于(m+n -1)； D. 不确定。

6如果要使目标规划实际实现值不超过目标值。

则相应的偏离变量应满足（B ）A. 0d +> B . 0d += C. 0d -= D. 0,0d d -+>> 7下列说法正确的为（ D ）A ．如果线性规划的原问题存在可行解，则其对偶问题也一定存在可行解B ．如果线性规划的对偶问题无可行解，则原问题也一定无可行解C ．在互为对偶的一对原问题与对偶问题中，不管原问题是求极大或极小，原问题可行解的目标函数值都一定不超过其对偶问题可行解的目标函数D ．如果线性规划问题原问题有无界解，那么其对偶问题必定无可行解 4.用最小元素法求初始调运方案是，运输表中数字格的个数为（D ）个。

m*n B 、m+n C 、m*n -1 D 、m+n -18对于第二类存储模型——进货能力有限，不允许缺货，下列哪项不属于起假设前提条件（ D ）A 需求是连续，均匀的B 进货是连续，均匀的C 当存储降至零时，可以立即得到补充D 每个周期的定货量需要一次性进入存储，一次性满足 9对于风险型决策问题，下列说法错误的是（ D ）A 风险型决策问题是指决策者根据以往的经验及历史统计资料，可以判明各种自然因素出现的可能性大小B 风险型决策除了满足一般决策问题的四个条件外，还需要加一个条件：存在两个或两个以上的自然因素，并可估算所有自然因素出现的概率C 期望值法就是决策者根据各个方案的期望值大小，来选择最优方案D 确定型决策其实是风险型决策的一个特例，即自然因素出现的概率为0，而其他自然因素出现的概率为1的风险型决策问题10下面哪些不是线性规划问题的标准形式所具备的（ C ）A所有的变量必须是非负的 B 所有的约束条件（变量的非负约束除外）必须是等式C 添加新变量时，可以不考虑变量的正负性D 求目标函数的最小值11下面哪项不是求解“不确定型决策问题”的方法（B ）A 悲观法B 期望值法C 折衷法D 最小遗憾法12用单纯形法求解线性规划问题时引入的松弛变量在目标函数中的系数为（A）A．0 B.1 C.-1 D.213如果要使目标规划实际实现值不超过目标值。

一台电脑BeTwin“一拖二”两个房间同娱乐

前言：自一个月前在这里放上一篇《其实你还有一台免费的主机》拙文后，得到了大家的肯定和支持，但还不够详细、具体，应用特色不够鲜明。

在《电脑报》资深编辑成惊羽的全程指导下，对该文进行了完善和改进，现在将她放在这里，希望能对大家起到一个参考的作用，说得不对的地方还请批评、指正。

由于版面的原因，报纸上精简了一些图片，这里给大家发一个完整版的。

电脑“一拖二”客厅书房同娱乐高清视频、华丽3D游戏横行的时代，你应该有台高性能电脑，但你不必为这两种需求购买两台高性能电脑！我要处理文档、老婆要看在线网络电视、孩子要玩Flash小游戏，你也没有必要购买3台电脑！借助软件，一台电脑就能满足你全家的需求！随着高清平板电视的逐渐普及、网络高清片源数量的增加，这大大激发了人们对HTPC的渴望。

按照传统的思维，要组建HTPC家庭影院就得新购一台性能强劲的电脑主机，这对工薪族可是一笔不小的开支。

但如果你的书房已经有了一台性能强劲的电脑，客厅里有一台高清电视机，那么恭喜你，看完此文你就能省下这笔新购电脑主机的费用，而又能完全享受HTPC带给你的震憾和乐趣。

家庭影院电脑简称HTPC（Home Theater Personal Computer的缩写），是以计算机担当信号源的家庭影院，显示设备可采用高清液晶电视机、高清等离子电视机、投影机等。

现在很多家庭的客厅里都有大屏幕的液晶电视，书房里有一台电脑，那么借助Betwin软件和Windows系统（Vista或XP）就可以让书房的电脑与客厅高清液晶电视机相连接，实现“一拖二”。

主机放在书房，办公、上网、娱乐一切照常；副机放在客厅，音频、视频信号通过延长线与主机连接，无线键盘和鼠标的接收端露在客厅的墙面上，在客厅里你就可以欣赏网上的经典影视，上网，玩网络游戏（单机游戏），展示数码照片等等，主机与副机的操作互不干涉，就像你家里有两台电脑一样。

这样做还有一个好处：数据资源是高度集中的，便于管理和分享。

[知识]美国安规-1

美国0000安0000规0000电线：1、黑白线印有18AWG105°C或150°C。

00002、SPT-1印有18AWG*2-150°C或20288字样。

00003、黑色代表正，白色代表负，双芯线有字为正极；无字为负极；线末没有端子，可浸锡。

0000地线：裸铜线一端有端子，接地符号为“GND”000灯头：规格上E27、E12，材料上有分陶瓷、电木灯头，标有UL或CSA及认证E******号码，灯头铜弹片刻有UL或CSA字样。

000工作电压：120V/60HZ000标签：瓦特标必须是耐高温的，标签背后有UL字样，需印有120V/60HZ，认证号码为*****MADE IN CHINA等字样，UL或CUL标签，目前使用的有四种DRY、DAMP、WET和PROTABDE即干燥，半干半湿，潮湿和移动式。

0000安装方式：一字板用5/32”螺钉锁紧在天花板墙壁上的接线盒上，中心牙节可长。

0000接线方式：用螺牙或接线帽或钳式接线端子，用胶布把端子包扎如吊灯、台灯电线的接线位需打UL结，零件包内附螺牙式接线帽，用于客人接线用。

0000出线长度：壁灯吸顶灯出线从中心量起不可少于6”，吊灯出线长度需根据客人要求而定，若从天房盖算起，也不能少于6”，吊链120”，电线144”。

0000矽套管：电源线是150°C可不用矽套管，如吸顶灯灯头电线是150°C的必须加矽套管保护，另处也有根据客人要求而加。

0000防火棉：吸顶灯通常需要防火棉，隔热。

0000耐高压：1200V 0、5MA 1SEC0000欧规0000电线：1、单芯、双芯和三芯之分。

00002、蓝色代表负极，棕色代表正极，电线上印有VDE认证标志。

00003、正负极符号“L”代表正，“N”代表负。

0000地线：黄绿线线未需加端子，不可浸锡，接地符号三E即地线标。

0000灯头：规格上分E14，B15，B22材料上有电木灯头和金属灯头，刻有VDE或其他欧州认可的安全标志。

小学一年级数学上下册知识点整理

小学一年级数学上册知识点整理一、读数、写数。

1.读20以内的数。

顺数：从小到大的顺序0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20倒数：从大到小的顺序20 19 18 17······单数：1、3、5、7、9······双数：2、4、6、8、10······（注：0既不是单数，也不是双数，0是偶数。

在生活中说单双数，在数学中说奇偶数。

）2.两位数（1）我们生活中经常遇到十个物体为一个整体的情况，实际上十个“1”就是一个“10”，一个“10”就是十个“1”。

如：A：11里有（1）个十和（1）个一；11里有（11）个一。

12里有（1）个十和（2）个一；12里有（12）个一13里有（1）个十和（3）个一；13里有（13）个一14里有（1）个十和（4）个一；14里有（14）个一15里有（1）个十和（5）个一；15里有（15）个一······19里有（1）个十和（9）个一；或者说，19里有（19）个一20里有（2）个十；20里有（20）个一B：看数字卡片（11~20），说出卡片上的数是由几个十和几个一组成的。

（2）在计数器上，从右边起第一位是什么位？（个位）第2位是什么位？（十位）个位上的1颗珠子表示什么？（表示1个一）十位上的1颗珠子表示什么？（表示1个十）（3）先读11、12、13、14、15、16、17、18、19、20，再写出来。

如：14，读作：十四，写作：14。

个位上是4，表示4个一，十位上数字是1，表示1个十。

二、比较大小和第几。

1.例如给数字娃娃排队：5、6、10、3、20、17，可以按从大到小的顺序排列，也可以按从小到大的顺序排列。

高中数学新教材同步必修第一册第2章习题课不等式恒成立、能成立问题

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
3.已知不等式x2＋ax＋4<0的解集为空集，则a的取值范围是
√A.{a|－4≤a≤4}
C.{a|a≤－4或a≥4}
B.{a|－4<a<4} D.{a|a<－4或a>4}
解析由题意得，Δ＝a2－16≤0，解得－4≤a≤4.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
4.已知不等式－x2＋4x≥a2－3a在R上有解，则实数a的取值范围为
√A.{a|－1≤a≤4}
C.{a|a≥4或a≤－1}
B.{a|－1<a<4} D.{a|－4≤a≤1}
解析由题意知，－(x－2)2＋4≥a2－3a在R上有解， ∴a2－3a≤4，即(a－4)(a＋1)≤0，∴－1≤a≤4.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
9.∀x∈{x|2≤x≤3}，不等式mx2－mx－1<0恒成立，求m的取值范围.
解由不等式mx2－mx－1<0，得m(x2－x)<1，
因为x∈{x|2≤x≤3}，所以x2－x>;x2－1 x，
1234
4.定义运算ac
db＝ad－bc，则不等式a1x
1 x＋1<0
对任意
x∈R
恒成立，
则实数 a 的取值范围是_－__4_<_a_≤__0__.
解析原不等式为ax(x＋1)－1<0，即ax2＋ax－1<0，a＝0时，不等式为－1<0，符合题意，当 a≠0 时，有aΔ<＝0，a2＋4a<0 ⇒－4<a<0，综上所述，a的取值范围是－4<a≤0.

F-PES基准2015版第一版

在防火门、防火卷帘门的动作范围内放置物品，导致防火门、卷帘 A 门无法完全关闭自动火灾报警器、消防栓、灭火器前存放杂物，阻碍操作 A：无法进行灭火（无法取出软管、无法走到自动火灾报警器前） 6-1-2 B：难以迅速移动（室内消防栓的软管卷盘箱前应确保80Cｍ以上宽 A/B/C 度的空地） C：在其前面可以迅速移动（施工工地不适用）消防设备/设施故障。 6-1-3 A等级：未保持正常功能状态｡ C等级：有轻微的损伤、破损。 6-1-4 消防设备/设施的指示灯未亮灯 6-1-5 未按规定实施灭火器点检 A／C C C A/B B C B B B C A／C C C C A B
A/B
B A B
26
5-1
27
危化品 33 34 35 36 37 38 39 40 41 42 储存 5）危化品管理
5-4 5-5 5-6 5-7 5-8 5-9
危化品从供料泵或存储罐等漏出或溢出 A：闪点低于60℃的液体、酒精等危险品流淌到地面或接油盘内。 B：除A以外的，闪点高于60℃低于250℃的危险品流淌到地面或接 A/B/C 油盘内（积累至接油盘深度的1／2以上时为不符合） C等级：危险品未流淌到地面或接油盘内，但泄漏、溢出、渗出的未及时擦干。在涂料混合室、调漆间、喷漆房、加油站内维修或作业时，没有使 A 用无火花工具（铍、铝、黄铜制工具）。需要接地的地方无地线。 A：闪点低于21℃的危险品的容器、设备及供油泵等 A/B/C B：闪点高于21℃低于70℃的容器、设备 C：使用闪点70-200℃的危险品的设备需要接地的地方地线松动：闪点低于70℃的危险品的容器、设备、 C 供油泵等危化品设施的防火间距不足或者在防火间距内存放可燃物品贮存有闪点低于60℃的危化品仓库内，未使用防爆型电气设备未规定危化品的贮存地点。危化品的贮存量超量未在贮存地点张贴「严禁烟火」标识。 B B B B B B B C C C C C C B B

TPO1阅读原文(二)The Origins of Theater及译文

新托福TPO1阅读原文(二):The Origins of TheaterTPO-1-2：The Origins of TheaterIn seeking to describe the origins of theater, one must rely primarily on speculation, since there is little concrete evidence on which to draw. The most widely accepted theory, championed by anthropologists in the late nineteenth and early twentieth centuries, envisions theater as emerging out of myth and ritual. The process perceived by these anthropologists may be summarized briefly. During the early stages of its development, a society becomes aware of forces that appear to influence or control its food supply and well-being. Having little understanding of natural causes, it attributes both desirable and undesirable occurrences to supernatural or magical forces, and it searches for means to win the favor of these forces. Perceiving an apparent connection between certain actions performed by the group and the result it desires, the group repeats, refines and formalizes those actions into fixed ceremonies, or rituals.Stories (myths) may then grow up around a ritual. Frequently the myths include representatives of those supernatural forces that the rites celebrate or hope to influence. Performers may wear costumes and masks to represent the mythical characters or supernatural forces in the rituals or in accompanying celebrations. As a person becomes more sophisticated, its conceptions of supernatural forces and causal relationships may change. As a result, it may abandon or modify some rites. But the myths that have grown up around the rites may continue as part of the group’s oral tradition and may even come to be acted out under conditions divorced from these rites. When this occurs, the first step has been taken toward theater as an autonomous activity, and thereafter entertainment and aesthetic values may gradually replace the former mystical and socially efficacious concerns.Although origin in ritual has long been the most popular, it is by no means the only theory about how the theater came into being. Storytelling has been proposed as one alternative. Under this theory, relating and listening to stories are seen as fundamental human pleasures. Thus, the recalling of an event (a hunt, battle, or other feat) is elaborated through the narrator’s pantomime and impersonation and eventually through each role being assumed by a different person.A closely related theory sees theater as evolving out of dances that are primarily pantomimic, rhythmical or gymnastic, or from imitations of animal noises and sounds. Admiration for the performer’s skill, virtuosity, and grace are seen as motivation for elaborating the activities into fully realized theatrical performances.In addition to exploring the possible antecedents of theater, scholars have also theorized about the motives that led people to develop theater. Why did theater develop, and why was it valued after it ceased to fulfill the function of ritual? Most answers fall back on the theories about the human mind and basic human needs. One, set forth by Aristotle in the fourth century B.C., sees humans as naturallyimitative—as taking pleasure in imitating persons, things, and actions and in seeing such imitations. Another, advanced in the twentieth century, suggests that humans have a gift for fantasy, through which they seek to reshape reality into more satisfying forms than those encountered in daily life. Thus, fantasy or fiction (of which drama is one form) permits people to objectify their anxieties and fears, confront them, and fulfill their hopes in fiction if not fact. The theater, then, is one tool whereby people define and understand their world or escape from unpleasant realities.But neither the human imitative instinct nor a penchant for fantasy by itself leads to an autonomous theater. Therefore, additional explanations are needed. One necessary condition seems to be a somewhat detached view of human problems. For example, one sign of this condition is the appearance of the comic vision, since comedy requires sufficient detachment to view some deviations from social norms as ridiculous rather than as serious threats to the welfare of the entire group. Another condition that contributes to the development of autonomous theater is the emergence of the aesthetic sense. For example, some early societies ceased to consider certain rites essential to their well-being and abandoned them, nevertheless, they retained as parts of their oral tradition the myths that had grown up around the rites and admired them for their artistic qualities rather than for their religious usefulness.译文：TPO-1-2 戏剧的起源由于几乎没有具体材料可供研究，探寻戏剧的起源只能凭推测。

常见的一二年生花卉

[园林用途]：重要的花坛花卉，作盆栽、吊盆、花台及花坛美化，大面积栽培具有地被效果，景观瑰丽、悦目。
5.百万小玲
[别名]：舞春花
[科属]：茄科矮牵牛属
[形态特征]：杂交种，一年生，花形和小花形矮牵牛相似，但它
的花瓣要厚一些且更加上挺，花茎是半木质化的，比一般茄科植物耐雨淋。和普通矮牛相比花和叶子都比较小，但是单花的花期要长，每朵花开了要开一周左右，满枝的花朵，象瀑布一样，小小的花朵非常可爱.。广东维生扦插繁殖出的舞春花从今年3月份开始就不断有花。其每朵花的花色会随着生长从黄色转变为红黄交错，最后变成胭脂红。
[园林用途]：江南地区常栽植于花坛、林缘、水边及岩石园，还可作切花。北方一般为温室冬春盆栽花卉。
8.藏报春
[别名]：中国樱草、大种樱草，中华报春
[科属]：报春花科报春花属
[形态特征]：多年生草本。全株被多细胞柔毛。根系粗壮，须根细长。叶基生；叶柄长2-15cm，有腺体刚毛，鲜时肥厚多汁，常带淡紫红色；叶薄膜质，阔卵圆形至椭圆状卵形或近圆形，长3-13cm，宽2-10cm，先端钝尖，基部心形，边缘不整齐的羽状深裂，裂片具不整齐锯齿，两面有腺体刚毛。花期12月至翌年3月，果期2-4月
[园林用途]：可作花坛、花丛及庭院栽培，也可上盆作摆花。
19.金盏菊
[别名]：金盏花、长生菊
[科属]：菊科金盏菊属
[形态特征]：多年生草本植物作一二年生栽培。株高3060cm,全株被毛。叶互生，长圆形至长圆状倒卵形，全缘，基部包茎。头状花序单生，花梗粗壮，花茎5cm左右，舌状花有黄、橙、橙红、白等色，也有重瓣、卷瓣和绿心、深紫色花心等栽培品种。花期4-6月。
[园林用途]：早春园林和城市最常见的草本花卉。盆栽摆放在中心广场、车站、商厦等共用场所；数盆点缀窗台或阳台。栽培得当，可周年开花，是晚秋、冬季和早春的重要花坛、花镜材料，也可作切花栽培。

视听说1-Unit 2-听力文本

新标准大学英语视听说教程（一）----Nancy SunUnit 2 Food, glorious food!Inside viewKey Wordsspicy 辛辣的curry 咖喱spice 香料selection 供挑选的东西moussaka (碎肉，茄子，奶酪)bake 烘焙oven 烤的，烤箱starter 第一道菜minestrone 意大利浓菜汤pasta 意大利面prawn 对虾，明虾chilli con carne 辣味肉末grill v. 烤；& n. 烤肉，烤架；grilled adj. 烤的Conversation 1Kate Oh, this looks nice.Mark Cool.Waitress Good afternoon, table for three? Come this way.Mark Let's have a look at the menu.Mark Thank you.Janet Thank you.Waitress The specials are on the board.Kate So, what sort of food do you like, Janet?Janet Well, I like spicy food. And I'm not very fond of raw （生的）food! What would you recommend?Mark Why don't you try the chicken curry? That's nice and spicy.Janet What's in it?Mark Chicken cooked in tomatoes and onions with Indian spices.Janet I'll try it. Do we all choose a selection of dishes to share or only one dish per person?Mark Usually one dish per person.Kate Or the moussaka looks good.Janet What's it made with?Kate It's made with lamb and eggplant. It's a Greek dish.Janet How is it cooked?Kate It's baked in the oven.saute 嫩煎['səutei]blanch 用沸水烫toss 搅拌casserole 砂锅['kæsərəʊl]parsley 欧芹paprika 辣椒粉[ pə'priːkə]Voice-over We were lucky to be invited into the kitchen at the Dooky Chase's Restaurant. Leah has been working in the restaurant for over 50 years. She told us about her life and she explained how to make a simple dish called "shrimp Clemenceau".Leah This is a very simple dish. 1)First you get some shrimp. You can do this dish with chicken or shrimp, but I like it with the shrimp better. So you just brown a little thing...Interviewer And, and what's, what's the actual, what's the cooking in?Leah Butter.Interviewer OK.Leah It just cook, so here you get a little cholesterol, but hey, that's it, a little cholesterol. 2)Then you wanna get the garlic. So you see it works two forces. You get the cholesterol, and then you get a little garlic, cut out on the cholesterol, you see.Interviewer OK. And where did you, where did you learn all the cooking?Leah Well, my mother, you know. I'm the top of the line of 11 children, so you get to learn how to cook whether you like it or not. You get to cook that way. Then here you want to add a little mushroom in here, this is just sliced button mushroom. If you like other mushroom, you can do that, we just saute that in there. You know, at home, when you, you have to cook, everybody had that turn in the kitchen. So this is a dish that is used in several restaurants, but this is my own version. Some people do it different than this, but I like it this way, because I like the ... Can you smell the garlic in there?Interviewer Oh, yeah.Leah Alright?Interviewer That smell is very strong.Leah Uha, and 3) then you want to add your peas. It's very, very simple.Interviewer And did you, did your mum run the restaurant as well?Leah No, no, my mother-in-law(岳母). My mother-in-law had this restaurant before I came in.And she started it in 41. I came in in 46. So, and I added many things. You have to understand in 41. Now here we can add our potatoes. You see our shrimp is all cooked there.- 4）Just add the potato. You can pre-cook your potatoes. You can boil them, or in this case, we, we blanch them a little bit. In that and just toss together, and you get one, you get just one casserole like here. 5）And you can put a little pepper on it. Give it a good dash of pepper. 6）A little salt. It's very simple, but it's a good dish. And as I said, you can do it with chicken breast or shrimp.You see? Toss it and get it there.Interviewer And what do you, what do you call the dish?Leah A shrimp Clemenceau. And I, I really don't know how it got that name, but it's popular in this area. But as I said, some people do it a little different. 7）You can take wine at this point.You can hit a little wine in there if you like it, but I, I just don't like to kill the taste of the butter and the garlic. I like that a lot. 8）And you can take the parsley, always parsley.Interviewer That's parsley, isn't it?Leah Parsley. Uhm. And I'm gonna show you something that all Creoles keep in their kitchen.You see you get kind of a like a dull look here. But every Creole has this paprika in their kitchen. 9）And give it all a dash of paprika. And you get a little color there, you see? A little red color there. And it's very, very simple, great dish to eat. Not hard to make. You see? And you have a good dish.AnswersP18, 25-1-6-7-2-9-3-4-8P18, 31. Leah has been working in the restaurant for over 50 years2. Shrimp is the main ingredient in the dish.3. The garlic helps to reduce cholesterol.4. Leah learned to cook from her mother. She had to learn to cook as she comes from abig family. She is the eldest of 11 children.5. Leah`s mother-in-law ran the restaurant when Leah was younger.6. Leah started cooking in the restaurant in 1946.7. All Creoles keep paprika in their kitchen.P19, 41-7 d e a f g b cListening inPassage 1Key Wordsentertain 招待hospitality 热情barbecue 烧烤campsite 营地vegetarian 素食主义者frustrated 受挫的elbow 肘Ben If it's a formal meal, maybe Thanksgiving or Christmas, or if you're with your boss or someone like that, you are being careful about your table manners. So you'd wait until everyone is served before you eat. But most of the time,, if you know each other well you would just (1)go ahead and start. It's more usual to entertain them at home because it shows your hospitality. We have a lot of barbecues outside, maybe in the garden or maybe at a campsite. But sometimes if you don't want to cook, (2)you can go to a restaurant.Oh, well, after dessert you'll have a little talk, then talk some more, have some coffee. Then you'll say, "Oh well, it's time for us, we should get going." And if you don't then you'reprobably going to be rude and (3)stay too late.Michelle Well, it would be between 8 and 8.30. It is unusual that if somebody is invited for 8 they would be there at 7.30 or 7.45. Probably 8, or 8.30 would be when all the guests (4)would arrive. It's OK to refuse something if you don't like it, but it might be embarrassing. For example, if I'm cooking dinner and I discover one of my guests is a vegetarian, I'll feel a bit frustrated that I didn't know before. But usually(5) everyone tries everything.Tom Well, usually the host serves the guests, so you should make sure you tell him or her not to give you too much, because yes, it's quite important to eat everything on your plate. It doesn't matter if you leave something, but if you leave a lot, it will look as if (6)you don't like their cooking.My mother always told me to put my hands on my lap, under the table when I wasn't eating, and I would be in big trouble if I ever put my elbows on the table. But actually I know that in some countries (7)that's considered rude. So I might rest my hands or my arms on the table, and I suppose it's a bit more relaxed today than it used to be when I was young.No, it's the worst thing you can do if you're eating. Any strange noises are absolutely forbidden. I mean you can say "mmm, this is good", but (8)nothing more than that. And even when you drink soup or eat noodles, you have to do it in silence, otherwise it's considered very bad manners.AnswersP20, 2Ben:1,3,8Michelle:2,5Tom:4,6,7Passage 2Key Wordsrevenue 收入nutrition 营养trendy 非常流行的masculine 男子汉的nutritionist 营养学家junk food 垃圾食品sum…up 总归News-reader The government announced today that they are going to ban advertisements for junk food during TV programmes for children under the age of 16. The rules will include any foods that are high in fat, salt and sugar. There will be a total ban on(1)ads during children's programmes and on children's channels, as well as adult programmes watched by a large number of children. But there will not be a total ban on all ads for junk food which are shown on television before 9 pm. This was thought to be "over the top" by representatives of the food industry. The new rules will come into effect before the end of December this year, and mean that (3)television channels will lose about £39 million in revenue for advertising.So why has the government introduced this ban? We asked leading food and nutrition expert, Neil Bennett.Neil Well, we all know that over the last 30 years, what we call junk food, bad food with too much fat and salt, has become easily available and eating habits have changed.However, in recent years many of us have become aware of the importance of keeping fit and eating healthily, and this means people are not going to fast food restaurants so often. So, the result is that the fast food business has increased the number of ads in order to recover some of the business it's lost.News-reader And how do the fast food restaurants do this?Neil The biggest problem is that (2)they aim their ads at young people. One well-known fast food restaurant chain sells hamburgers which come with a free gift, usually a toy which is linked toa new children's film. Other fast food restaurants aim their ads at teenage and college-age men,trying to make their food trendy and, you know, kind of masculine food.News-reader So a ban on junk food ads will stop the sales of junk food?Neil Almost certainly not, but it might (4)reduce the growth of the fast food industry.News-reader So you're in favour of the ban?Neil As a nutritionist, I am. As a father of two young children, I'm not sure.News-reader Why not?Neil Because less money from advertising will mean (4)less money for children's TV programmes.So we're likely to see more cheap and violent cartoons, and fewer programmes produced specially for children.News-reader So the choice is between junk food and junk television?Neil Yes, that just about sums it up.News-reader Neil Bennett, thank you.AnswersP21, 61-4 c d b dP21,71-8 e h g a c b f d。

1#、2#、3#楼砌墙方量

一道墙二道墙
C轴、4-6轴
3.91 7.31
A-B轴、4-6 轴
5.58 1.77 5.58 1.77
0.20 0.30 0.20 0.30
2.12 2.12 1.45 1.15
2.00 2.00 2.00 2.00
17.59 4.73 2.25 3.24 1.22
一道墙二道墙
B轴、4-6轴
0.93 5.58
合计一道墙 12.85 A轴、3-4轴、6二道墙 12.85 东面 7轴三道墙 12.85 一道墙 9.45 3轴、A-B轴、C二道墙 9.45 南面 D轴三道墙 9.45 四层一道墙 12.81 D轴、3-4轴、6二道墙 11.73 西面 7轴三道墙 12.81 一道墙二道墙北面三道墙 4.58 4.58 4.58 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.85 1.06 1.12 0.85 1.06 1.11 0.85 1.06 1.11 0.85 1.06 1.12
Hale Waihona Puke 29.72 5.40 6.74 7.12 3.19 4.32 4.17 5.57 6.60 7.34 2.49
一道墙二道墙
1轴、A-D轴
一道墙二道墙
一道墙 21.85 D轴、3-4轴、6二道墙 20.77 西面 7轴三道墙 21.85 一道墙北面 7轴、B-D轴 9.78
一道墙二道墙一道墙
一道墙二道墙北面三道墙
7轴、C-D轴
合计 6.89 5.02 东面 A轴、3-7轴二道墙 17.17 三道墙 17.17 一道墙 9.39 3轴、A-B轴、C二道墙 9.39 南面 D轴三道墙 9.39 一道墙六层一道墙二道墙西面三道墙一道墙二道墙北面三道墙 16.93 16.93 16.93 4.70 4.70 4.70 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.85 0.85 1.06 1.11 0.85 1.06 1.12 0.85 1.06 1.11 0.85 1.06 1.11