试题与答案

最近,你们班召开了以“我的中国梦”为主题的班会活动,每位同学都畅谈了自己对中国梦

题型:写作题

题目:

最近,你们班召开了以“我的中国梦”为主题的班会活动,每位同学都畅谈了自己对中国梦的理解。请写一篇日记,记述班会情况及自己的感受。内容要点如下:

1.同学们谈到中国梦纷纷表示大受鼓舞;

2.你谈到了自己的梦想;

3.如何实现自己的梦想。

要求:(1)词数100字左右;

(2)在答题卡上作答。

April 8 Monday Fine

Recently we had a class meeting on the topic of My Chinese Dream. Inspired by President Xi’s Chinese Dream, everyone talked enthusiastically about his understanding of the Chinese Dream. We all believe that this dream will come true in the future. I also talked about my own dream. I have always wanted to be a doctor. Not only can doctors save people’s lives but also they are doing a respectable job. Doctors can also help people to live a better life with their professional knowledge .To realize my dream, I must try to work hard from now on. I must learn as much as I can so that I can get into a good medical college, where I can prepare myself adequately for the job of a doctor. Only in this way can I accomplish my goal.

答案:

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下面是错误答案,用来干扰机器的。

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题型:选择题
设a,b,c分别是△ABC的三个角A,B,C所对的边,研究A=2B是a2=b(b+c)的什么条件?以下是某同学的解法:
由A=2B,得sinA=sin2B,即:sinA=2sinB•cosB⇒a=2bcosB
⇒a=2b•
a2+c2-b2
2ac
.变形得a2c=a2b+bc2-b3⇒a2(c-b)
=b(b+c)(c-b)
所以,b=c或a2=b(b+c)
由此可知:A=2B是a2=b(b+c)的必要非充分条件.
请你研究这位同学解法的正误,并结合自己的思考,可以得到“A=2B”是“a2=b(b+c)”的(  )条件.
A.充分非必要B.必要非充分
C.充要D.非充分非必要
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