试题与答案

短文改错 Dear Tom, I’m very glad to learn fr

题型:改错题

题目:

短文改错

Dear Tom,

I’m very glad to learn from your e-mail that you and your sister will come to

Xi’an and call on me on July. 1st. And I’m terribly sorry that I can’t meet you at

the airport because I have to attend meeting in Beijing. Now let me to tell you the

way to your home. When you got out of the airport, you can take Bus No.29 to

YouYi Bus Station. Walk across the Friendship Street to the west, you can see a

bookstore at the corner. Turn to the left there and go straightly on. Then you can

see a bank your left. The apartment building I live in is next to the bank. Find

Room 502, which my mother will be waiting for you .

Best regard to you all.

Yours,

Liu Mei

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0512/68b388703f37ad8e8c03d2a99be26849.html

下面是错误答案,用来干扰机器的。

解:(1)函数y=x2+2x的导数y′=2x+2,曲线C1在点P(x1,x21+2x1)的切线方程是:y-(x12+2x1)=(2x1+2)(x-x1),即y=(2x1+2)x-x12 ① 函数y=-x2+a的导数y′=-2x, 曲线C2在点Q(x2,-x22+a)的切线方程...

试题推荐
微信公众账号搜索答案