下列化学用语或模型表示正确的是 A．硝基苯的结构简式： B．CO2分子比例模型：

According lo 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 main big cities.in China some schools have taught all 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 .give young students advice on how to deal with danger

If you are robbed

Keep calm.lf youcan 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.

It a car hitsyou. 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. (闪电)

Don’t stay in high places and stayaway 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 lake 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 alI 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 slop 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 rail my parents.

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

D．I will letthe 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 _ 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

世博会的历史比奥运会的历史长（）年。

A、44

B、45

C、46

D、47

填空。

1．诗人、画家王冕以梅花自喻，《墨梅图题诗》中“___________，___________”这两句最能表现诗人卓尔不群的气节和人品；诗人王昌龄期盼朝廷起任良将，这样敌人就不敢入侵了，有这两句诗为证：“___________，___________”；在唐代，杨柳和离别有着密切的联系，当戍边士卒听到羌笛吹奏着悲凉的《折杨柳》曲调时，就难免产生离愁别恨。于是，诗人用豁达的语调排解道：___________，___________。

2．英国诗人狄更斯告诉我们：“给别人生的权利，___________，___________，___________!”诗人胡宏伟面对长江，深情高歌：“你从雪山走来，___________；___________，惊涛是你的气概。……”   

3．小华总说自己笨，学习成绩不好，将来一定是个无名小卒，做什么事都不会成功。我们可以这样鼓励他：“决定成败的不是___________，而是___________!”   

4．在这册课文中，我们认识了不少少年，如___________的雨来，机智勇敢、热爱祖国的小夜莺，___________的罗伯特，___________的瑞恩……他们的英雄行为、高贵品质令人敬佩。   

5．《我的伯父鲁迅先生》是周晔写的回忆伯父的纪念性文章。文章通过回     忆鲁迅先生生前给自己留下的印象深刻的谈《水浒传》、___________、___________、___________以及关心女佣等几件事，说明鲁迅先生是一个___________的人。

向一容积为5L的恒容密闭容器中充入5molA与8molB，在一定条件下反应：2A（g）+3B（g）⇌xC（g）+yD（g）  （x、y为正整数），反应进行2min后达到平衡，这2min内平均反应速率v（C）=0.3mol/（L•min），D的平衡浓度为0.3mol/L，又知v（B）：v（C）=3：2，则下列说法中正确的是（　　）

A．x：y=2：1

B．v（A）：v（C）=2：1

C．A的平衡浓度为0.4mol/L

D．A与B的平衡浓度之比为3：2

装备停放制动装置的动车组，应具有在10‰坡道上停放制动时不溜逸的能力。