题目内容

9.No one this building without the permission of the police.

A. is leaving
B. is to leave
C. has left
D. will be leaving

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10.I ping-pong quite well, but I haven’t had time to play since the New Year.

A. will play
B. have played
C. played
D. play

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11.When he was alive, the old scientist used to say that knowledge from practice and he gained his experience by doing a lot of practical work.

A. was coming
B. will come
C. comes
D. would come

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12.— Sorry, I forget to post the letter for you.— Never mind, it myself tonight.

A. I’m going to post
B. I’ve decided to post
C. I’ll post
D. I’d rather post

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下列三种缓冲溶液,缓冲能力(或缓冲容量)最大的是( )

A. 1.0 mol·L-1HOAc + 1.0 mol·L-1NaOAc;
B. 0.01 mol·L-1HOAc + 0.01 mol·L-1NaOAc;
C. 1.0 mol·L-1HOAc + 0.01 mol·L-1NaOAc;
D. 0.01 mol·L-1HOAc + 1.0 mol·L-1NaOAc。

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9.No one this building without the permission of the police.

A. is leaving B. is to leave C. has left D. will be leaving

10.I ping-pong quite well, but I haven’t had time to play since the New Year.

11.When he was alive, the old scientist used to say that knowledge from practice and he gained his experience by doing a lot of practical work.

12.— Sorry, I forget to post the letter for you.— Never mind, it myself tonight.

下列三种缓冲溶液,缓冲能力(或缓冲容量)最大的是( )

A. is leaving
B. is to leave
C. has left
D. will be leaving