重力式桥台依据桥梁跨径、桥台高度及地形条件的不同有多种形式，常用的类型有( )。

You want to run across the street to catch the bus which is leaving soon? But wait! You’d better not. If a policeman sees you, you’ll have to pay a fine (罚款).

New traffic laws (交通法) say that if people cross the street when the light is red, they can be fined as much as 50 yuan.

Traffic accidents killed more than 104,000 people in China last year. Chinese cities have more cars than ever. Drivers and pedestrians (行人) must work together to make the streets safer.

The law has new rules for drivers and pedestrians. Drivers have to slow down when they are close to crosswalks. If people are in a crosswalk, cars must stop to let them pass.

There are rules for bus drivers, too. If bus drivers smoke, drink or make phone calls while driving, they can be fined. Buses that carry too many people are also against the law.

Pedestrians will have to walk more safely under the new law. They must cross streets at crosswalks. Also, they shouldn’t climb over the fences (栅栏) along streets.

Do you bike to school? It’s not a good idea to carry classmates on the back. You could be fined 50 yuan.

And stay in the bike lane (慢车道) when you’re riding. The big roads are for cars and buses.

Do you like to ride your uncle’s motorbike? When you put on your helmet (头盔), ask him to put one on, too. People on motorbikes must wear helmets, the new law says. If they don’t, they’ll have to pay 200 yuan.

Do you ride in cars often? Don’t forget to put on your seat belt (安全带), even if you’re going for a short taxi ride. It could save your life.

If you see a hit-and –run (肇事逃逸), tell the police. They may give you a reward (奖赏). And don’t be afraid to help people to the hospital if they are hurt in an accident. Don’t worry about money. The new law says that doctors must take care of them even if they can’t pay right away.

小题1:Don’t go across the road when _______.

A．the light is green

B．the light is red

C．the bus is leaving

D．traffic is busy小题2:What does the word “crosswalk” mean is Chinese?

A．过马路

B．人行横道

C．立交桥

D．车行道小题3:If you are a bus driver, _______while you are driving, according to the new traffic laws.

A．you can make a phone call

B．you can’t talk to others

C．you can’t smoke

D．you can drink小题4:When you ride in a car, the first thing you must do is __________.

A．to put on the helmet

B．to tip the driver

C．to put on the seat belt

D．to see if it carries too many people小题5:You should do all the following EXCEPT _________.

A．carrying your classmate on the back when you’re riding a bike

B．phoning the police when you see a hit-and-run

C．helping people to the hospital if they are hurt in an accident

D．wearing your helmet while riding a motorbike

（文）把一枚硬币投掷5次，恰好2次出现正面的概率为______．

线段有(    )个端点，射线有(    )个端点，直线(    )端点．

指出下例句子中句式不同的一项 [ ]

A．不如登高之博见也。

B．马之千里者，一食或尽粟一石。

C．雁荡具体而微者。

D．今战士还者不足两万耳。

对于多组分样品的气相色谱分析一般采用色谱柱室程序升温操作，如此操作的主要目的是( )。

A．使各组分都有较好的峰形

B．缩短分析时间

C．使各组分都有较好的分离度

D．延长色谱柱使用寿命