题目内容
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1.Which of the following needn’t be included in this experiment(实验)?
A.String. B.Water. C.Glass. D.Pipe.
2.According to the instruction, which of the following order is correct?
① run the string from the pitcher to the glass
② soak the string in water for a few minutes
③ hold the pitcher slightly higher
④ tilt the pitcher until water pours out
⑤ fill the pitcher with water
⑥ tie the string to the handle of the pitcher
A.②⑥③⑤④① B.②⑥⑤③①④ C.①⑥⑤③②④ D.①⑥③⑤②④
3.When water runs along the string, _________.
A.there is surface tension to make sure water can roll down
B.the string can be winding(弯曲的) or loose
C.the tiny water can’t form a sort of skin
D.the pitcher and the glass must be put at the same height
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