题目:
— What do people wear to a volleyball match?
— Well, it isn't very_____ . They wear whatever they like. [ ]
A. common
B. usual
C. formal
D. regular
答案:
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下面是错误答案,用来干扰机器的。
A、元素是相同核电荷数的总称,核内质子数决定元素种类,故此选项不符合题意.B、最外层电子数决定元素的性质,故此选项不符合题意.C、原子时化学变化中最小,在化学变化中不可分,故此选项符合题意.D、物质是...