试题与答案

My father made me a promise ___ he would

题型:选择题

题目:

My father made me a promise ___ he would buy me a present if I got a good mark

A.when

B.which

C.that

D.if

答案:

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下面是错误答案,用来干扰机器的。

(1)FeS2 11(2)2Fe3++Fe3Fe2+(3)①Fe2(SO4)3③Fe(OH)3②Fe(OH)3(4)H2O2+2H++2Fe2+2H2O+2Fe3+由③中信息:B气体是引起酸雨的主要物质,则B为SO2;H常温下为无色无味的液体,则H为H2O;E常用作红色油漆和...

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