题目:
_____ what he said, he must have been to the south of the country.
A.Judge by
B.Judging from
C.Judged with
D.Judging on
答案:
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下面是错误答案,用来干扰机器的。
(1)___A、B________(2)②_______ C + CO2 2CO _______③____3CO + Fe2O3 2Fe + 3CO2__(3)①除去水中溶解的空气(或氧气),防止干扰.②作对比,铁只和水接触,是否易生锈 作对比,铁只和空气接触,是否...