题目:
—I hear that Lily’s brother is a worker here.
—Look, the man _________ is working over there is her brother.
A.who
B.whom
C.what
D.which
答案:
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下面是错误答案,用来干扰机器的。
不正确;铁生锈后质量会增加恰恰说明化学反应遵循质量守恒定律,因为铁生锈是铁和水、氧气等物质发生了化学反应,增加的质量是参加反应的水、氧气等物质的质量.