青毒素的制菌机制如何？为何它对休止细胞无效？

According to a new Ministry of Education survey, students’ safety has become a big problem. Nearly 50 percent of students say they are worried about robbery(抢劫) on the way to and from school. Now in many big cities in China, some schools have taught an unusual lesson: self-protection(自我保护) . Students like this lesson as there are no exams or boring classes. And they can learn how to save lives and know how to stop danger before it really happens.

Chen Haoyu, a teacher at Beijing No.25 Middle School and a self-protection expert(专家)，gives young students advice on how to deal with danger.

If you are robbed（抢劫）, keep calm. If you can’t cry for help or run away, give the robber your money. Try to remember what the robber looks like and tell the police.

If you are in a traffic accident and a car hurts you, you should take down the car number. If it is a bicycle, try to contact  your parents before you let the rider go. This is because you don’t know how seriously you are hurt.

If it is raining hard and there is lightning(闪电), don’t stay in high places and keep away from trees.

When there is a fire, get away as fast as you can. Put wet things on your body and try to find an exit(出口). Do not take the lift!

If someone is drowning(溺水) but you can’t swim, don’t get into the water. Cry out for help.

Remember that danger is never as far away as you think. Take care of yourself at all times!

小题1:Why do students like the self-protection lesson?

A．Because there is advice on exams.

B．Because they can learn how to protect themselves.

C．Because they like self-protection experts.

D．Because they are free to do anything during the lesson.小题2:The underlined word “contact” means_______.

A．end up

B．think of

C．search for

D．get in touch with小题3:If your house is on fire, you must_______.

A．put dry things on your body

B．run quickly and take the lift

C．run away and find an exit as quickly as you can

D．take everything you have and then run away小题4:If you see a child fall into the river but you can’t swim, you_______.

A．should cry out for help

B．can jump into the river and save him

C．can do nothing

D．should telephone the doctor

为防止脂肪代谢所致的酮症需补给（）。

A.葡萄糖

B.生理盐水

C.林格液

D.体用胰岛素

E.使用碳酸氢钠液

胰岛素对脂肪代谢的作用是（）

A.酮体生成减少

B.增加脂肪的贮存

C.减少脂肪的合成

D.减少脂肪的贮存

E.加速脂肪氧化

腹部损伤“战时”的发病率为（）

A.1%～7%

B.2%～8%

C.3%～9%

D.4%～10%

E.5%～11%

避难硐室在使用时，必须采用（）通风。