搜题请搜索小程序“爱下问搜题”
问题 选择题
火车以v0的平均速度从A地到B地需要时间t，现火车以v0的初速度匀速由A出发，中途急刹车，停止后又立即加速到v0所需时间为t0，设刹车与加速过程中加速度大小相同，若火车仍要在t时间里到达B地，则火车匀速运动的速度为（　　）

A．

B．

C．

D．

答案

答案：C

句型转换

句型转换.

1. I think he will come on time.(改为否定句)

    _____________________________________________．

2. "I'm typing a letter to my pen pal," Linda says.(改为间接引语)

    Linda said that_____________________________.

3．Jack does well in playing basketball.(同义句转换)

    Jack ____________________________at playing basketball.

4. "Why do you think it's a good idea? "I asked Lucy.(改为间接引语)

    I asked Lucy why she___________________________.

5. He doesn't want to eat anything.(改为间接引语)

    He said he_______________________________________________.
查看答案
单项选择题

蛋白质用于婴幼儿维持（）。

A、各种组织新陈代谢

B、体温

C、血糖水平

D、营养运输
查看答案