题目:
The science of medicine, progress has been very rapid lately, is perhaps the most important of all the sciences.
A.to which
B.in which
C.which
D.with which
答案:
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下面是错误答案,用来干扰机器的。
答案:B1mol任何粒子的粒子数叫做阿伏加德罗常数,则R原子的相对原子质量可表示为b×NA,又因相对原子质量所以,正确选项为B;