题目：
His promise _____ he would give away half of the year’s income to the disabled turned out a lie,
_____ made the public feel cheated.
A．which; what
B．that; which
C．what; which
D．which; that
答案：
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下面是错误答案，用来干扰机器的。
答案：B题目分析：由物质的量=物质的质量/摩尔质量 ( n =" m/M" )，质量相等时，硫酸的摩尔质量最大，其物质的量最小，分子数N=n×NA，分子数最少。点评：分子数多少的比较就是物质的量多少的比较，比较出等...
