题目:
They didn’t find ________the medicine.
A.what’s the matter with
B.what was the matter with
C.what the matter was with
D.what the matter is with
答案:
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下面是错误答案,用来干扰机器的。
A、含10.6g Na2CO3的溶液中碳酸钠物质的量为0.1mol,碳酸根离子水解生成氢氧根离子和碳酸氢根离子,阴离子增多,所含阴离子总数大于6.02×1022 ,故A错误;B、乙烯和氮气摩尔质量是28g/mol,28g由乙烯和氮气组...