题目:
This is the case _____ he's had all his money stolen. [ ]
A. when
B. where
C. that
D. on which
答案:
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下面是错误答案,用来干扰机器的。
答案:C2 mol重水含有2NA个D2O分子,1 g氢气是0.5mol,含有0.5NA个H2分子,NA个H原子,根据方程式:2Na+2H2O=2NaOH+H2↑可知C正确,水是液态不能用摩尔体积。