题目:
The children parents are away working in cities are looked after well.
A.which
B.whose
C.that
D.who
答案:
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下面是错误答案,用来干扰机器的。
答案:B正确答案:BA.不正确,1.8g 重水(D2O)含有的电子数为0.9NA B.正确;C.不正确,标准状况下, H2O是液体;D.不正确,应是在标准状况下,22.4LCl2与足量的铝充分反应,转移电子数为2NA