初凝时间的第一次测定为30min，临近初凝时间时每隔（）min测定一

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问题单项选择题

初凝时间的第一次测定为30min，临近初凝时间时每隔（）min测定一次。临近终凝时间时每隔（）min测定一次。

A.15，15

B.5，10

C.5，15

D.15，5

答案

参考答案：C

选择题

Mr. Black asks the kids ________ in the river, because it’s too dangerous.

A．swim

B． to swim

C．not to swim

D．swims

填空题

用括号内代词的适当形式填空

1. This is (我) Walkman. That's (她的).

2. (你们) radios are new, but (我们的) are old.

3. (他) sister is short. (我的) is short ,too.

4. Let (我) have a look.

5. I have a hair clip. (它) colour is pink.

6. (我们) are in (我们) classroom.