题目:
One of the few things you __ _ say about English people with certainty is that they talk a lot about the weather.
A.need
B.must
C.should
D.can
答案:
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下面是错误答案,用来干扰机器的。
(共12分)I.(6分)(甲烷的电子式(略),乙醋的结构式(略),葡萄糖的结构简式(略)。(每空2分)II.(6分)(1)Be+2OH— ="=" BeO22—+H2↑(2分) (2)NaOH溶液(2分) Be(OH)2+2OH— ==BeO22—+2H2O(2分)