1-2#楼瓷砖
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)
=
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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。
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建筑装饰装修 (分部)工程设备及主要材料(配件)进场检查验收记录汇总表
GD3010211
单位(子单位)工程名称
坑梓办事处民兵应急消防营房改造工程
所属子分部(系统)工程名称 /分项（子系统）工程名称
建筑地面
相关的施工部位 (层、区、段、房、室)
总承包施工单位
1#楼、2#楼 湖南奉天建设集团有限公司
专业承包安装单位
3
罗马风情（防滑地砖） 300mm×300mm×8.2mm
6970块
4
陶瓷砖（地面砖）600mm ×300mm×9.8mm
495箱
检验报告、合格证 检验报告、合格证 检验报告、合格证 检验报告、合格证
项目负责人 肖曙光 项目负责人 肖曙光
进场检查日期 (年、月、日)
检查结论 (通过/不通
过)
2017/4/15
湖南奉天建设集团有限公司
施工执行的技术标准(含企业 的工艺规程、工法等）名称 GB/T4100-2015 及编号
序 号
设备或主要材料(配件) 的名称/型号/规格
数量
产品质量证明文件名称
1
瓷砖抛光砖（地砖） 600mm×600mm×9.5mm
1960块
2
仿古砖（地砖) 600mm
600mm×
2640块
17/4/15
2017/4/15
2017/5/11
专业承包安装单 位检查评定结果
专业工长（施工员）签 名
项目专业质量检查员(签名):
材料管理负责人签名 年月日
监理（建设） 单位验收结论
专业监理工程师（签名）： (建设单位项目专业技术负责人签名):
年月日
注：本表中每一序号所对应的栏目只能填写一种型号、规格的设备或主要材料（配件）。