酵母生长和发酵有何区别？

Many young people use computers, but few of them know how to look after them. Remember the following when you use your computer.

◆Keep your computer in a cool room. Too much or too little heat is bad for computers. Most computers work best at a temperature of 5 ºC—30 ºC.

◆Don’t let people smoke cigarette(香烟）near your computer. Smoke of all kinds is very bad for many parts of a computer and can cause many problems.

◆Don’t eat or drink when you are near your computer. Pieces of food and a little water in the keyboard can also cause many problems.

◆Make sure the screen is the correct distance from your eyes. If you wear glasses, make sure these glasses are correct for using with the computer. Some people use a different pair of glasses when they use a computer.

◆Keep your screen clean and don’t have it too bright. A dirty screen can hurt your eyes. A very bright screen can also be bad for your eyes.

小题1: According to the passage you should use your computer          .

A．in a small room

B．in a big room

C．in a cool room

D．below 5ºC小题2: When you work on the computer, you can            .

A．wear glasses

B．smoke cigarette

C．eat some hamburgers

D．clean the keyboard with water小题3:If you want to look after your eyes, you should            when you use computers.

A．buy a pair of sunglasses

B．keep your screen clean

C．have your screen very bright

D．keep your screen near your eyes

人格核心是（）

A.气质

B.能力

C.性格

D.需要

E.动机

下列有关腹腔镜检查患者的并发症，应除外（）

A.腹膜外气肿

B.气栓

C.感染

D.膈肌脓肿

E.误伤腹腔脏器

圆形钢锭冷却均匀，容易剥皮，适于（）生产。

A.普碳钢

B.合金钢

C.优质碳素结构钢

变压器油纸电容型套管拆除外引接地结构末屏端子时，应采取措施防止端部转动造成损坏。