Miss White was going to give a lecture on Friday afternoon.But on Thursday night she
题目
Miss White was going to give a lecture on Friday afternoon.But on Thursday night she
Was told that she had to go to an important meeting the next day at the same time.“No one
Can be in two places at the same time.What shall I do ” she thought.But soon,she had
An idea.
At five to three on Friday afternoon Miss White went to the lecture room.There were
Twenty students waiting there for her.“I’m sorry,” she tole them.”I won’t be able to give
My lecture today.” The students looked surprised.Miss White explained that she had an im-
Portent meeting.” However”,she went on,” Though I can’t be with you myself,my voice
Can.” Then she put a small tape recorder on the desk,” You see,I’ve recorded my lecture
And you can listen to it without me .”Miss White turned on the recorder and left.
The meeting ended a little early.Miss White decided to go back to her students.She
stood for a moment outside the lecture room ,listening to her own voice.Then quickly
答案
1.C
2.D
3.D
4.C
5.C
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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