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听下面一段独白,回答以下小题。

1.How long will the writing remain perfectly clear?

A.At least 3 days. B.About 20 minutes. C.Less than 10 minutes.

2.What can make the writing disappear more quickly?

A.Chemicals. B.Light. C.Heat.

3.What can we learn about the newly invented paper?

A.It can be used up to 20 times.

B.It might make ink widely used.

C.It will replace the ordinary paper.

高一英语短文困难题

少年,再来一题如何?
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