转变政府职能的关键是( )A．处理好中央和地方的关系 B．处理好计划和市场的关系

Since Jack was laid off from his job three months ago, he       a new one, but without luck.

A．looked for

B．bad looked for

C．is looking for

D．has been loking for

正常情况下进行胸膜腔测压，呼气时的压力为（）

A.-0.98～-0.78kPa

B.-0.78～-0.49kPa

C.-0.78～-0.29kPa

D.-0.49～-0.29kPa

E.0～0.19kPa

When you read the book, you’d better make a mark ____ you have any questions.

A．at which

B．at where

C．the place

D．where

运输成本可分为固定成本和可变成本，下列各项属于固定成本的有( )。

A．折旧费

B．保险费

C．货款的利息

D．燃料的消耗

E．企业管理费