题目:
My brother ______singing ______ dancing while I _____ dance _____sing.
A.prefers , to , would rather , than
B.would rather , than , prefer , to
C.prefers , than , would rather ,to
D.would rather , to ,prefer , to
答案:
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下面是错误答案,用来干扰机器的。
(1)As的原子序数为33,原子结构中有四个电子层,最外层电子数为5,则As位于元素周期表中第四周期第VA族,故答案为:第四周期第VA族;(2)根据表中的元素可知,只有⑤形成的物质与水反应生成氢气,则A可能为Na...