人身保险市场供给包括质和量两方面内容，供给的质的含义包括：（）。 ①保险公司提供的

— Many people are worried that so many college graduates each year can’t find a job.

— There is no need to worry about it as the government is now making every _______ to provide more jobs.

A．effort

B．effect

C．measure

D．action

下列物质中，属于纯净物的是（　　）

A．人体呼出的气体

B．经过净化处理的自来水

C．冰与水的混合物

D．澄清的石灰水

粉碎机的下料斗是正四棱台形(如图),它的两底面边长分别是80 mm和440 mm,高是200 mm,计算制造这一下料斗所需铁板是多少？

He gave me two answers ______ the question, but ______ of them is right.
[A] of, neither [B] to, both[C] to, neither

离心泵发生汽蚀会使泵的（）降低。

A.入口压力

B.入口流量

C.出口流量

D.入口温度