阿伏加德罗常数约为6.02×10²³mol^一。下列叙述中正确的是    (    )

A．常温常压下，20.0 g重水(D₂0)所含的中子数约为6.02×10²³

B．室温下，42.0 g乙烯和丙烯的混合气体中含有的碳原子数约为3×6.02×10²³

C．通常状况下，1 mol的NO₂与N₂ 0₄混合气体变为标准状况时其分子数约为6.02×10²³

D．常温下，7.1 g C1₂与足量NaOH溶液反应转移的电子数约为0.2×6.02×10²³

Questions 15 to 17 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage.

From good movies we can ______.

A．learn to become a better person

B．learn to make an entertaining film

C．understand life a little better

D．find better ways to gain our ends