简述颚式破碎机与圆锥破碎检修后空载和负荷试车的时间要求。

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问题问答题简答题

答案

参考答案：

颚破空载试车

8小时

负荷试车48-72小时

圆破

空载试车

2小时

负荷试车48小时

填空题

Fill in the blanks with the proper forms.(用所给单词的适当形式填空。)

1. Look! The tiger is _______ (swim) .

2. I can _______ (make) a snowman.

3. Everyone _______ (like) to get birthday cards.

4. I usually _______ (go) home at 5 o'clock in the afternoon.

5. I'm _______ (clean)the room now.

6. — _______ you ______ (eat) breakfast at 7:00 every day?

— Yes, I do.

7. When is ______ (you) birthday?

8. There are some _______ (sheep)on that farm.

9. They _______ (be) playing football together.

10. I like _______ (read) books.

单项选择题

( )指数是综合指数的变形。

A．分化
B．特例
C．集中
D．平均数