向一定量的Fe、FeO、Fe2O3、Fe3O4的混合物中加入150mL4 mol·L-1的稀硝酸恰好使混合物完全溶解,放出2.24LNO(标准状况),往所得溶液中加入KSCN溶液,无红色出现。若用足量的H2在加热条件下还原相同质量的混合物,所得到的铁的物质的量为 A.0.21mol B.0.25mol C.0.3mol D.0.35mol19、每空只填一个词,使对话完整正确。
A:What call I(1)
for you?
B:Tomorrow is my mother’s
birthday,I'm not(2)
what I have to buy for her.
A:Look at those shoes over there.
B:Oh,no,I don’t think she’ll(3)
them.
A:What(4) this
handbag?
B:Yes,it’s very nice.But I think it’s a little(5) .Do you have a smaller one?
A:Yes,(6)
you are.Is it all(7)
?
B:Yes.How(8)
is it?
A:480yuan.
B:That’s too expensive.Do you have a(9) one?
A:Yes.the one on the left is
only 160 yuan.
B:OK,I'll(10)
it.Here is the money.
A:Thanks a lot.
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