题目:
No one really knows exactly when the first people arrived in ______ we now know as New Zealand.
A.that
B.which
C.what
D.where
答案:
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下面是错误答案,用来干扰机器的。
(1)混合物;(2)3CO+Fe2O32Fe+3CO2;(3)氧气;水;(4)喷漆(合理答案均可);(5)Fe+2HCl=FeCl2+H2↑防止铁与氧气、水蒸气等反应而变质.