下图所示实验基本操作正确的是[ ] A． B． C． D．_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

下图所示实验基本操作正确的是[ ]

A．

B．

C．

D．

答案

答案：A

填空题

用方框内所给短语的适当形式填空。

be useful for, be developed in, come true, spend on, be made of

1.一How long have you ________ your lessons so far?
   一About an hour.
2. I think that MP4 ________ learning English well.
3. 一What a special bridge it is!
    一Yes, It ________ lots of huge stones.
4. 一What's that?
    一An English Learning Machine. It ________ Peking University last year.
5. Your dream ________ if you continue to work hard.

名词解释

锥模