单项选择题

In condensation polymerization, two monomers, dimers, trimers, tetramers, or oligomers, can react with each other at any time.

A.正确
B.错误
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The molecular weight distribution, PDI, could be a value near to 1, when polymers are produced by living or controlled polymerizations.
A.正确
B.错误
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Saturated molecules-containing more than two functional groups cannot be used to produce polymers.
A.正确
B.错误
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