政府的失败是公共选择理论的研究重点，分析政府行为的效率以及寻找使政府最有效率工作的规

阅读理解。

     Each year several thousand people are killed on the road in Great Britain. Every year between one and

  two hundred thousand people are injured, or killed in road accidents.

     If you are in England and if you listen to the eight o'clock news from BBC, you will often hear news of

 road accidents. You may hear something like this" On last Monday evening, at about twenty minutes to

 ten, a cyclist was knocked down by a truck at crossing of Oak Road and High Street in Croydon. The

 cyclist has died from his injuries. Anyone who saw the accident please communicate (联系) with New

 Scotland Yard, telephone number Whitehall one, two, one, two. "

     Accidents are often caused by carelessness. If everybody obeys the rules, the roads will be much safer.

 How can we make the road safer?

     In Breat Britain traffic: keeps on to the left. Motor-cars, trucks, buses and cyclists must all keep to the

 left side of the road. In most other countries traffic keeps to the right.

     Before crossing the road, stop and look both ways. Look right, look left again. Then, if  you are sure

 that the road is clear, that there is nothing coming, it is safe to cross the road. If you see small children, or

  very old people, or blind people, waiting to cross the road, it is kind act to help them to cross the road in

  safety.

     We must teach young children to cross the road safely. We must always give them a good example.

 Small children mustn't play in the street.

1. How many people are injured on the road in Great Britain every year?

    A. Several thousand.

    B. Between one and two hundred people.

    C. Between 100,000 and 200,000 people.

    D. Between l,000 and 2,000 people.

2. New Scotland Yard " may be _____.

    A. the police                  

    B. a factory mending cars

    C. a big hospital                

    D. a group saving people from road accidents

3. "In Great Britain traffic keeps to the left" means _____ .

    A. all the cars, buses coming and going along the road must be driven along the left side of the road

    B. all the cars, buses coming and going along the road must be driven to the left side of the road

    C. only trucks must be driven along the right side of the road

    D. all the cars buses coming and going along the road must be stopped on the left side of the road

4. In our country traffic should keep _____.

    A. to the left    

    B. in the right    

    C. on the left    

    D. to the right

5. Which of the following is RIGHT?

    A. Every road accident is caused by carelessness.

    B. "The road is clear means "There's nothing on it."

    C. Before crossing the road in China, you should look left first and then look right.

    D. People can play in the street except small children.

男，54岁，右上腹部不适，CT检查如图

肝内病变的MRI表现，错误的是（）

A.肝囊肿在T₁WI上呈极低信号，T₂WI上呈明显高信号

B.肝癌及肝血管瘤在T₁WI上均为稍低信号，而在T₂WI上肝癌为稍高信号，血管瘤为极高信号

C.大多数肝内病变在T₁WI呈低信号，T₂WI上为高信号

D.肝内结石或钙化在T₁WI及T₂WI上均为低信号

E.巨块型肝癌有液化坏死或出血者以及血管瘤伴血栓形成者，常为混杂信号

学生体质与健康管理的内容包括哪些方面？

梅尼埃病发作时见到的自发性眼震类型多数为_________。

以下有关RAID 0的描述中，错误的是：（）

A.RAID 0是无差错控制的条带化阵列

B.RAID 0的容量是各成员盘的容量之和

C.RAID 0至少要使用3块成员盘

D.RAID 0的数据是并行的写入到每个成员盘中