2007年考研英语一答案

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2007考研英语（一）真题及答案解析

Directions：

Read the following text. Choose the best word(s) for each numbered blank and mark A，B，C or D on ANSWER SHEET 1.(10 points)

By 1830 the former Spanish and Portuguese colonies had become independent nations. The roughly 20 million 1 of these nations looked 2 to the future. Born in the crisis of the old regime and Iberian Colonialism, many of the leaders of independence 3 the ideas of representative government, care

一、填空题（30分）：

1. （6分）由晶闸管构成的三相半波可控整流电路，当输入交流电压为u2?311sin?t，纯阻性负载且其值为R?10?，当控制角??45时，输出平均电压为 ，输出的功率因数是 。

2．（6分）由晶闸管构成的单相桥式全控整流电路，当输入交流电压为u2?141sin?t，负载为反电动势且直流侧串联平波电抗器，已知E?60V, L=?，R?2?，当控制角??30??时，输出平均电压为 ，输出平均电流为 。 3．（3分）缓冲电路( Snubber Circuit ) 的作用是 。 4．（3分）在交流供电系统中，当基波电流为I1?40A，各次谐波电流分别为

I3?2A, I5?1A, I7?0.5A, I9?0.2A , 则电流谐波总畸变THD为 。

5．（3分）在逆变电路中，对于同一桥臂的开关管要采取“先

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2015年考研英语一真题

2015年全国硕士研究生入学统一考试英语（一）

试题及答案

考试时间：2014年12月27日 14：00-17：00

Section I Use of English :

Directions: Read the following text. Choose the best word(s) for each numbered blank and mark A, B,C or D on the ANSWER SHEET. (10 points)

Though not biologically related, friends are as “related” as fourth cousins, sharing about 1% of genes. That is _(1)_a study, published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has__(2)_.

The study is a genome-wide analysis

旗开得胜

读万卷书行万里路1

Section I Use of English

Directions:

Read the following text. Choose the best word(s) for each numbered blank and mark A,B,C or D on the ANSWER SHEET.(10 points)

As many people hit middle age, they often start to notice that their memory and mental clarity are not what they used to be. We suddenly can’t remember ___1___ we put the keys just a moment ago, or an old acquaintance’s name, or the name of an old band we used to love. As the brain ___2___, we refer to these occurrences as "senior moments." ___3___ seemin

考研政治真题及详细讲解

一、单项选择题：1～16小题。每小题1分，共16分。下列每题给出的四个选项中，只有一个选项是符合题目要求的。请在答题卡上将所选项的字母涂黑。

1.“风定花犹落，鸟鸣山更幽”形象地表达了动和静的辩证关系是

A．静不是动，动不是静B．静中有动，动中有静 c必然的，静是偶然的D．动是静的原因，静是动的结果

【参考答案】B【解题分析】这道选择题所考查的知识点是对运动和静止辩证关系的理解和确认。题干是王安石的著名诗句，从哲学意义上分析该诗句体现运动和静止的辩证关系是：上句“风定花犹落”是说“静中有动”，下句“鸟鸣山更幽”是指“动中有静”，两句合起来正是体现了动映成趣，即“动中有静和静中有动”的辩证关系。选择此题，必须首先理解诗句的含义，然后再分析其蕴含的哲学道理。此种类型题从形式上看有一定难度，但只要抓住答题的规律，这一分应很容易得到。特别是该题是老师在课堂上讲到运动和静止关系的时候，列举的一个典型的例题，也是相关辅导材料上的原题，凡是听过课的，做过题的，都应毫不费力找到正确答案。如果有的考生丢分，或是误选A项。该题的正确选项是B。

2.“挟泰山以超北海，语人曰吾不能，是诚不能也。为长者折枝，语人曰吾不能，是不为也，非不能也。”《孟子》中

2011年考研英语(一)真题

Section I Use of English Directions:

Read the following text. Choose the best word(s) for each numbered blank and mark [A], [B], [C] or [D] on ANSWER SHEET 1. (10 points)

Ancient Greek philosopher Aristotle viewed laughter as “a bodily exercise precious to health.” But _____some claims to the contrary, laughing probably has little influence on physical filness Laughter does _____short-term changes in the function of the heart and its blood vessels, ____ heart rate and oxygen consumption But because hard laug

2011年考研英语一真题答案及详解 2011年01月21日 16:46 万学海文

2011年考研英语一真题答案及详解

Section I Use of English

1-5 CDBBA 6-10 BADCA 11-15 BCDCB 16-20 DADAC

1.C

解析：语义逻辑题。第一句含义是“古希腊哲学家亚里士多德把笑看作是“有益于身体健康的宝贵锻炼”，第二句意思是“但是 一些人提出相反的意见，轻笑可能对身体健康影响极小”，两句之间是转折关系，A、B、C、D四个选项中只有C选项表转折“尽管”，故是正确选项。

2.D

解析：语义辨析题。上下文语境是“笑确实能 短期的改变”。A. reflect“反映”，B. demand“要求”，C. indicate“表明，暗示”，D. produce“产生”，只有D 选项符合语境，所以是正确答案。

3.B

解析：语义搭配题。文中提到“笑能够 心律呼吸速率。” A. stabilizing 意思是“安定，稳定”，B. boosting“促进，推进”，C. impairing“损害，削弱”，D. determining“决定”，根据语境应该是“笑能够促进心律呼吸

2014年考研英语（一）真题及答案解析（网络版）

Section I Use of Language

Directions：

Read the following text． Choose the best word（S） for each numbered blank and mark A，

B ，C or D on ANSWER SHEET． （10 Points）

As many people hit middle age， they often start to notice that their memory and mental clarity are not what they used to be． We suddenly can't remember 1 we put the keys just a moment ago， or an old acquaintance's name， or the name of an old band we used to love． As the brain 2 ， we refer to these occurrences as "senior moments．" 3 seemingly inn

2010年考研英语一

Section I Use of English

Directions:

Read the following text.Choose the best word(s) for each numbered blank.and mark[A]，[B]，[C]or[D]on ANSWER SHEET 1. (10 points)

In 1924 American National Research Council sent to engineer to supervise a series of experiments at a telephone-parts factory called the Hawthorne Plant near Chicago. It hoped they would learn how stop-floor lighting __1__ workers productivity. Instead，the studies ended__2__ giving their name to the “Hawthorne effect” the extremely influential idea the ver

2014年考研英语（一）真题及答案解析（网络版）

Section I Use of Language

Directions：

Read the following text． Choose the best word（S） for each numbered blank and mark A，

B ，C or D on ANSWER SHEET． （10 Points）

As many people hit middle age， they often start to notice that their memory and mental clarity are not what they used to be． We suddenly can't remember 1 we put the keys just a moment ago， or an old acquaintance's name， or the name of an old band we used to love． As the brain 2 ， we refer to these occurrences as "senior moments．" 3 seemingly inn