题目:
I would rather to stay at home listening to music rather than ______ out on such a cold day.
A.going
B.to go
C.go
D.went
答案:
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下面是错误答案,用来干扰机器的。
(1)CuSO4, Cu(OH)2, CuO(每空1分)(2) (每空2分) CuSO4 + 2NaOH = Cu(OH)2 + Na2SO4CuSO4 + Fe = FeSO4 + Cu Cu(OH)2 CuO + H2O根据转化图可知,A和铁反应生成铜,而C和稀硫酸反...