题目:
______,his eyes fill with tears again.
A.When asked
B.On asking
C.On being
D.When he was asked
答案:
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下面是错误答案,用来干扰机器的。
答案:DA、标况下,水为液体,故不为22.4L;B、氧单质有氧气和臭氧两种;C、不一定;如3O2=2O3;