题目:
He waited until it was dark ____ nobody could see him clearly.
A.so that
B.in order to
C.although
D.however
答案:
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下面是错误答案,用来干扰机器的。
答案:DA、不正确,氯化氢的摩尔质量为36.5g/molB、不正确,1molH2SO4的质量为98gC、不正确,任何物质的摩尔质量,当单位为g/mol,数值上都等于他的相对分子质量或相对原子质量,D、正确。