患者女性，35岁，主诉腹胀，4天未排便，触诊腹部较硬且紧张，可触及包块，肛诊可触及粪

用括号内所给词的适当形式填空。

1. Two cats and a dog ________ (be) in the room.

2. —Thank you for ________ (help) us.

    —That's OK.

3. I would like ________ (stay) at home on Sunday.

4. It takes her about 30 minutes ________ (get) there.

5. I am tired of ________ (stay) at home all the time.

After two days of long walk, his strength gave __.

A．off

B．out

C．un

D．up

二极管的伏-安特性是指二极管两端所加的电压与通过它的电流之间的关系曲线。

在萃取塔中C₄相和水相哪个是连续相？哪个是分散相？

选用叉车时，其最大爬坡度应满足叉车作业的具体要求，该值应不小于进出场地的最大坡角。国产叉车标准中，满载最大爬坡度为25～30°。（15~20）