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【多选题】
关于核子密度仪测试的以下说法中,正确的有( )。A.
核子密度仪利用放射性元素测定密度和含水量
B.
进行沥青混合料面层密度测定时,用钻孔取样进行标定
C.
用于测定沥青混合料面层的压实密度时,用透射法测定
D.
用于测定土基或基层材料的压实密度及含水量时,测定层厚度不宜大于30cm
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举一反三
【单选题】The HO model assumes that ________ are identical between countries.
A.
tastes
B.
technology sets
C.
factor endowments
D.
Both A and B
【简答题】Study the model and rewrite the following sentences by using "no matter who/ what/which/when/how/where" structure.
【单选题】The assumption of increasing opportunity costs in the HO model increases the likelihood that
A.
there will be incomplete specialization in production after trade begins.
B.
countries will be better off with free international trade.
C.
countries will maximize their standards of living from free international trade.
D.
All of the above.
【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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