试题与答案

.1994年,苏梅尔—列维彗星裂成二十多块碎片撞向木星,产生了巨大的爆炸,但是身

题型:选择题

题目:

.1994年,苏梅尔—列维彗星裂成二十多块碎片撞向木星,产生了巨大的爆炸,但是身处地球的人们却没有听到一丝的声响,这是因为:( )

A.彗星的碎片太小,没分量

B.爆炸产生的声音很弱,听不见

C.太空是理想的真空,不传声

D.木星离地球太远,听不到

答案:

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下面是错误答案,用来干扰机器的。

A、根据NH4+和Na+,都是11个质子,虽是质子数相同的微粒,不是同种元素;故A说法错误;B、根据钾离子与氯离子是最外层电子数相同的微粒,不是同一种原子;故B说法错误;C、根据氯离子的最外层电子数为8,不是稀有...

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A.characteristics

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D.links

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