在低温回收凝析油时,向稳定塔内通入汽提气,可以降低凝析油中轻组分的(),促进凝析油中轻组分的气化和分离。
A.压力
B.分压
C.温度
D.密度
参考答案:B
—Drugs (毒品) have done great harm to some people and their families.
—I quite agree with you, so we should _________ them. [ ]
A. keep away from
B. shut down
C. get on with
D. put off
已知某两种商品的交叉弹性等于1.8,则这两种商品是()。
A、独立品
B、替代品
C、补充品
D、完全补充品