具有较小分配系数的组分,每次分配在气相中的浓度较(),因此就较()的流出色谱柱。
参考答案:大;早
我国具有典型的季风气候,冬季盛行( )。
A.西北风
B.偏北风
C.东南风
D.偏南风
The most important ______ of the farmers in Iraq is dates, of which Iraq is the world's leading exporter.
A.economic crop
B.cash crop
C.money crop
D.staple