（EMB145）（）保证主登机门收上的速度比放下的速度要快。 A.作

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问题单项选择题

（EMB145）（）保证主登机门收上的速度比放下的速度要快。

A.作动筒内部限流器

B.专用的电磁活门

C.单向限流活门

D.作动筒内部限流器和专用的电磁活门

答案

参考答案：C

填空题

大陆是世界上最高的大陆，也是地球上唯一一块人类共有的陆地，有之称。

句型转换

同义句转换。

1. An elephant is stronger than a horse.

A horse is_____ _____ _____ _____ an elephant.

2. Tom is very strong. He can lift the heavy box.

Tom is _____ _____ _____ _____ the heavy box.

3. I was so amazed that I couldn't say a word.

I was _____ amazed _____ say a word.

4. Kate works harder than me.

I _____ work _____ _____ _____ Kate.

5. I have about thirty books. Mary has about fifty books.

Mary has _____ books _____ me.