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【单选题】
当高聚物的相对分子质量足够大时,高聚物的黏流活化能随相对分子质量增大而A.
增大
B.
保持不变
C.
减小
D.
先增大后减小
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皮皮学刷刷变学霸
举一反三
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【简答题】指出下列各种遗传现象是属于哪一种细胞质基因所决定的: a.紫茉莉花斑遗传是受____ ______ ___所决定;b.草履虫放毒性遗传是 所决定。
【单选题】One of the predictions of the HO model is that
A.
countries with different factor endowments but similar technologies and preferences will have a strong basis for trade with each other.
B.
countries will tend to specialize, but not completely, in their comparative advantage good.
C.
reciprocal demand leads to an equilibrium terms of trade by inducing changes in both demand and supply.
D.
All of the above.
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