多数情况下，无上皮衬里的囊肿是（） A.牙源性角化囊肿 B.甲状舌管囊肿 C.含牙囊

下列化学实验中能达到预期实验结果的是（　　）

A．借助托盘天平和其他手段测定铜锌合金中锌的质量分数为36.25%

B．用pH试纸测定某未知溶液的pH为5.5

C．20℃时，配制2%的氢氧化钙溶液

D．将100g 10%的稀盐酸加热蒸发掉50g水，使得稀盐酸溶质质量分数变成20%

According to a new survey, students’ safety has become a big problem. Nearly 50% of students say they are worried about robbery on the way to and from school. Now in main 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 seriously you are hurt

If it is raining hard and there is lighting

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

When there is a fire

Get 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

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 time!

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

①Because there are no tests.

②Because the lessons are boring

③Because they can learn how to save lives.

④Because they can 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 seriously 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

       [注]：征铎（duò）：装在车马上的铃。檞（jiě），又读（xiè），树名。枳：树名，又称臭橘、枸橘，开白花。杜陵：古县名，在今陕西省西安市东南。回塘：回环曲折的池塘。

（1）前人评论“鸡声茅店月，人迹板桥霜”一联为“意象具足，始为难得”。请结合全诗对此加以分析。

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（2）“枳花明驿墙”一句中的“明”用得很妙，请说出妙在何处。

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砻谷的原理不同，砻谷机的结构亦不同，砂盘砻谷机是属于应用（）脱壳的典型砻谷设备。

A、挤压搓撕原理

B、端压搓撕原理

C、撞击原理

我军曾实行过多少种兵役制度？