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【单选题】
在缩聚反应中界面缩聚的最突出优点是(    )。
A.
反应温度低    
B.
低转化率下获得高分子量聚合物
C.
反应速率快    
D.
摩尔比要求严格
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【简答题】“Everybody loves a bargain.” One person's useless, ugly, or broken object can be another person's bargain. That is why so many Americans do not throw things away. They put them outside their houses. T...
【简答题】'Everybody loves a bargain.' One person’s useless, ugly, or broken object can be another person's bargain.That is why so many Americans do not throw things away.They put them outside their houses.They...
【单选题】In my opinion, the beauty of a person should be measured ______ one’s personality rather than one’s appearance.
A.
on account of
B.
in favor of
C.
in terms of
D.
by means of
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【简答题】“Everybody loves a bargain.” One person’s useless, ugly, or broken object can be another person’s bargain. That is why so many Americans do not throw things away. They put them outside their houses. T...
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【单选题】In one's lifetime, if fortunate, one is likely to be blessed by the friendship of another person ________ existence can be a great inspiration.
A.
whose
B.
which
C.
who
D.
whom
【判断题】由液态转变为固态的过程称为凝固亦称结晶。
A.
正确
B.
错误
【单选题】The author's attitude toward the opinion held by Card and DiNardo is one of
A.
reserved consent.
B.
strong disapproval.
C.
slight contempt.
D.
enthusiastic support.
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