下列错误的提法是（）。 A.总时差最小的工作是关键工作 B.关键

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问题单项选择题

下列错误的提法是（）。

A.总时差最小的工作是关键工作

B.关键线路上不能有虚工作

C.关键线路上工作的总持续时间为最长

D.关键线路上的工作都是关键工作

答案

参考答案：B

填空题

根据句意及首字母提示完成句子

1. The sun is s_______ all day.

2. He bought a train ticket with a r_______.

3. It is p_______ for him to work out the problem because he is very clever.

4. There are many clouds in the sky, you'd better take an u_______ with you.

5. The wind is too s_______ for the old man to walk.

6. When is the best time to v_______ your country?

7. What will be the w_______ like?

8. It is p_______ to go to the Great Wall.

解答题