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问题 解答题

学校伙食团有5吨大米，平均每天用去360千克．请你帮助算一算，这些大米够吃20天吗？

答案

5吨=5000千克，

5000÷360=13（天）…320（千克）；

13天＜20天，

答：这些大米不够吃20天．

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A．强化

B．消退

C．惩罚

D．回避条件反射
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用适当的词填空。

1. I don't know _____ I can do for you.

2. — Could you tell me _____ the film begins, please?

    — About six o,clock.

3. He doesn't know _____ his father is so worried about him ?

4. — Do you know _____ he gets off the bus?

    — At the next stop.

5. Could you tell me _____ is the man standing over there?

6. Can you tell me _____ that's a fast train or not?
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