下列引起肾素分泌的因素是（） A.肾动脉低血压、肾小管远端低钠 B.肾动脉压与肾素分

处理胃肠手术后的腹胀，宜首选（）。

A.胃肠减压

B.肛管排气

C.腹部按摩

D.肌内注射新斯的明

E.高渗盐水低压灌肠

According to a new survey . Students’ safety has become a big problem. Nearly 50% of students say they are worried about robbery (抢劫) on the way to and from school. Now in some big cities in China, some schools have taught an unusual lesson: self-protection. Students like this lesson because 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 gives young students advice on how to deal with danger:

If you are robbed

Keep calm. lf you can not cry for help or run away, give the robber your money. Try to remember what the robber looks like and tell the police later.

If you are in a traffic accident.

If a car hits you. You should remember the car number. If it is a bicycle, try to call your parents before you let the rider go. This is because you don't know how badly you are hurt

If it is raining hard and there is lighting. (闪电)

Don’t stay in high places and stay away from trees.

When there is a fire.

Run away as fast as yon can. Put wet things on your body and try to find an exit. Do not take the lift.

If someone is drowning(溺水)

If 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?

①Because there are no tests.

②Because the lessons are boring

③ Because they can learn how to save lives.

④Because they know how to stop danger before it happens.

A．①②

B．②③

C．①②④

D．①③④小题2:What will you do if a bicycle hurts you?

A．I will remember the bicycle number.

B．I won't let the rider go until I call my parents.

C．I will let the rider go before I call my parents.

D．I will let the rider go because I know how badly I am hurt.小题3:lf 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:There are _____ ways of self-protection mentioned in the passage.

A．3

B．4

C．5

D．6小题5:The best title for this passage is ________ .

A．How to Keep Calm

B．Self-protection

C．An usual lesson

D．Danger

试述臀大肌、股四头肌、小腿三头肌的位置和作用。

下列除哪项外均是白塞病神经系统病变表现（）

A.脑脊髓的任何部位因为小血管炎而受损

B.腰椎穿刺示颅内压正常脑脊液检查无阳性发现

C.在基本症状出现后的数月到数年内出现

D.患者多缓慢起病

E.见于20％的患者

450F传感器在飞机的什么位置（）

A.发动机高压压气机机匣上

B.发动机吊架里

C.发动机风扇机匣上

D.发动机涡轮机匣上