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1.Which of the following needn’t be included in this experiment(實驗)?

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(彎曲的) 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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