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    Doing experiments can be interesting, and you may try the following experiments at home. Make sure that you’ll do them with an adult.

    小题1:How many experiments are there in the pictures?
    A．Six.B．Five.C．Three.D．Two.
    小题2:The following are the instructions on how to do “Step 2” in these experiments. Which one is the right order?
    a. Pour 3/4 of the water away. 
    b. Put a balloon on the bottle.
    c. Put the bottle in a bucket of hot water. The air rises into the balloon.
    A．a, b, cB．a, c, bC．b, a, cD．c, a, b
    小题3:What can you see in the bottle at last in Experiment A?
    A．Some ice.B．Some water.
    C．Some ice and water.D．A cloud and some water.
    小题4:What will happen to the balloon in “Step 3” in Experiment C?
    A．It will be bigger.B．It will be broken.
    C．It won’t change.D．It will be in the bottle.

    小题1:C
    小题2:B
    小题3:D
    小题4:D
    短文属于图表类阅读。实验空气遇冷遇热的变化。
    小题1:细节理解题。从图片中可以看出，共有三个实验。
    小题2:综合理解题。通过认真看图分析，可以得知。实验A的第二步是倒出一些水，以便于有形成云的足够的空间；实验B的第二步是把瓶子放在热水中，以便于使瓶中的空气遇热上升进入气球；实验C的第二步是把气球放在瓶子上。
    小题3:细节理解题。从实验A的第④步“…there is a cloud”可以看出瓶中产生了云，当然里面还有原来的水。
    小题4:推理判断题。因为“cold air falls”可知，瓶中的空气遇冷要下降，气球也随之下降进入瓶中。
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    阅读短文，判断下列句子是否符合短文内容。符合的写“A”，不符合的写“B”。

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