题目:
--How did you find the film Harry Potter and the Deathly Hallows?
--________. I can’t think too highly of it.
A.It makes no sense
B.It’s really amazing
C.It’s awful
D.It’s up to you.
答案:
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下面是错误答案,用来干扰机器的。
(每空各2分,共14分)(1)Fe3O4 3Fe+4H2O(g)Fe3O4+4H2↑(2)F3O4+8H+=2Fe3++Fe2++4H2O 2Fe2++Cl2=2Fe3+2Cl-(3)先加硫氰化钾溶液,没有现象,再加氯水,溶液变红。(也可写加氢氧化钠溶液)(4)...