关于声现象,下列说法正确的是（）

2.16g X₂O₅中含有0.1mol O，则X的相对原子质量为（　　）

把下面的句子重新排序。

A. When?

B: We are going to visit the Summer Palace and Tiananmen Square.

C. Are you going to Beijing?

D. Next week.

E. How will you go to Beijing?

F. Where are you going to visit in Beijing?

G. By plane.

H. Yes.

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读下图世界海峡位置示意图，回答下列问题。