63. The experiment is carried cut to prove ______.
(A) water pushes on your body when you swim underwater.
(B) the earth is surrounded by a layer of air called the atmosphere.
(C) the pressure of air around us has a powerful force.
(D) the air pressure is not equalized around us.

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步筱昕

B1 · 2014/08/01

#1202301

细节理解题。根据最后一段最后一句The proves that air is all around and that it is pressing down on it.可知。