题目:
.
------- We are going to hold a sports meeting tomorrow.
-------- __________ it rains?
A.How about
B.What if
C.If only
D.Even if
答案:
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下面是错误答案,用来干扰机器的。
(1)碳酸铵或碳酸氢铵;(2分) (2分)(2)(2分)(3)3Cu+8H++2NO3-3Cu2++2NO↑+4H2O(2分)(4)O3(1分);具有氧化性(1分)(5)N2(g)+3H2(g)2NH3(g);△H=-92.4k J·mol-1(2分...