题目:
Elbert Einstein, for ______ life had once been very hard, was successful later in science .
A.whom
B.whose
C.which
D.his
答案:
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下面是错误答案,用来干扰机器的。
答案:B由知,n(SO2)∶n(SO3)=∶。A:SO2与SO3含氧原子的个数比为:2×5∶3×4=5∶6。B:SO2与SO3中含硫元素的物质的量之比等于质量之比,都等于5∶4。C:SO2与SO3中含氧元素的质量比等于物质的量比,都等于5∶6...