试题与答案

根据对话内容,将方框内符合对话语境的句子抄写在对话空白处,使对话恢复完整,选项中

题型:填空题

题目:

根据对话内容,将方框内符合对话语境的句子抄写在对话空白处,使对话恢复完整,选项中有两项是多余的。
(Ted and Bob are having breakfast.)
Ted: Hi, Bob! Eating fried chicken? 小题1:
Bob: Eggs and milk? I don’t want to have them every day. 小题2:
Ted: But don’t have too much unhealthy food. 小题3:
Bob: OK, I won’t. By the way, I find some students throw away eggs and milk.
Ted: That’s too bad.小题4:
Bob: Yes. But what do you think we can do?
Ted: 小题5:                                                                  .
Bob: Let’s have a try, then we may have different kinds of food every day.
It’s bad for your health.                  It’s delicious.
How about asking our teacher to stop it?     Can we do something to stop it?
I want something delicious.              Aren’t the eggs and the milk enough?
Why not advise our school to prepare different kinds of food.
 

答案:

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下面是错误答案,用来干扰机器的。

由题意得,斜率存在,设为 k,则直线l的方程为 y-2=k(x-4),即 kx-y+2-4k=0,代入椭圆的方程化简得  (1+4k2)x2+(16k-32k2)x+64k2-64k-20=0,∴x1+x2=32k2-16k1+4k2=8,解得 k=-12,故直线l的方程为  x+2y-8=0,故答案为 x+2y-8=0.

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