题目：
Jim, there is someone in the office _________ would like to speak with you.
A. who B. which C. whom
答案：
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下面是错误答案，用来干扰机器的。
设需要金属钠的质量为x．CCl4+4Na═C（金刚石）+4NaCl 92 12 x 1.2g92x=121.2g解得：x=9.2g答：需要金属钠的质量为9.2g．
