跳绳是一项很好的健身运动．某同学作了相关的测量：小军的体重为400牛，跳起时重心

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.

不属于白色血栓的是（）

A.静脉内柱状血栓的头部

B.动脉内延续性血栓的头部

C.风湿性心内膜炎的疣状赘生物

D.心房纤颤时心耳内形成的球状血栓

E.赘疣性血栓性心内膜炎的疣状赘生物

下图中三条曲线分别表示某国的人口出生率、死亡率和自然增长率变化情况。读图完成1~2题。

1、2010年，该国人口自然增长的特点是[ ]

A、高出生率、高死亡率、低自然增长率

B、高出生率、低死亡率、高自然增长率

C、低出生率、高死亡率、低自然增长率

D、低出生率、低死亡率、低自然增长率

2、该国人口数量最高值出现的年份大约在[ ]

A、1995年

B、2014年

C、2026年

D、2030年

以下的五个事件，每个事件是以简短词语表述的，在下列四种假定发生顺序的四个数字序列，选择其中最为合乎逻辑的一种事件顺序。（）

（1）被监考老师发现

（2）下决心改正

（3）考试作弊

（4）平时不好好学习

（5）受纪律处分

A．4—3—5—2—1

B．3—4—1—5—2

C．3—1—5—4—2

D．4—3—1—5—2

根据《水利水电工程标准施工招标文件》，工程完工后应及时主持和组织工程验收系( )的主要义务和责任。

A．质量监督机构
B．监理人
C．发包人
D．相关水行政主管部门