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【单选题】
1-1. 尼龙-66是哪两种物质的缩聚物( )。A.
尿素和甲醛
B.
苯酚和甲醛
C.
己二酸和己二胺
D.
氯乙烯和乙烯醇
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反馈参考答案：
举一反三
【单选题】It was in the house ___he used to live that the exhibition was held.
A.
where
B.
that
C.
as
D.
which
【简答题】名词解释:灭菌
【简答题】名词解释:灭菌方法
【判断题】( ) The central issue that safeguards clean water is possibly to remove poverty.
A.
正确
B.
错误
【简答题】1262年,李璮趁忽必烈和 激战之机发动。
【单选题】If the ship is found to comply with regulation, the PSCO will issue a "clean” inspection report to the _______of the ship.
A.
manager
B.
owner
C.
master
D.
chief engine
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