一艘快艇在平静的湖面上启动并向岸边驶去，水中鱼可听到马达声，

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问题填空题

一艘快艇在平静的湖面上启动并向岸边驶去，水中鱼可听到马达声，岸边飞的鸟、散步的人也可听到，若距快艇的距离都相等，觉察快艇启动先后的是______．

答案

因为声音在空气中比在水中传播速度慢，因此觉察快艇启动先后的是鱼、人（或鸟）．

故答案为：鱼、人（或鸟）

句型转换

1. We must clean the classroom every day.(同义句转换)

We must _______ the classroom _______ every day.

2. It took me two days to finish the book.(同义句转换)

I _______ two days _______ the book.

3. You should eat an apple every day.(对画线部分提问)

_______ _______ you do every day?

4. —May I ask you some questions, Miss Wang?(对问句作出回答)

—Sure, go_______.

5. They have to get up early every day.(改为一般疑问句)

_______they _______ _______ get up early every day?

判断题

在一般工程中，可用水准仪测量水平角、竖角。