读下图，完成下列问题。小题1:若图是以极点为中心的俯视图，_爱下问搜题

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问题选择题

读下图，完成下列问题。

小题1:若图是以极点为中心的俯视图，且M、N所在经线两侧为不同日期，则此时北京时间为(　　)

A．0：00

B．8：00

C．16：00

D．20：00小题2:若图是地球侧视图，MN为赤道，图示部分既是东半球又是夜半球，且北京正午人影将越来越长，则此时北京时间为(　　)

A．3月21日3：20

B．3月21日15：20

C．9月23日3：20

D．9月23日15：20

答案

小题1:B

小题2:C

试题解析：

小题1:此题考查日界线。国际日界线和自然日界线分别为180°和0时经线。顺地球自转方向，过180°，日期减一天，反之，加一天；顺地球自转方向，过0时经线，日期加一天，反之，减一天。图中没有告诉自转方向，也没有明确告诉哪为180°和0时经线，所以学生要假设判断。判断（如图）:①北半球（逆时针），N所在经线为180°，M所在经线为0时经线，也为0°经线（两点所在的经线构成经线圈）。故北京时间（120°E）为8:00（东加西减。经度差15°，时间差1小时）。同理假设南半球。故选B。

小题2:图示部分既是东半球又是夜半球，即20°W—0°—160°E为夜半球，顺地球自转方向，昼半球进入夜半球为昏线；顺地球自转方向，夜半球进入昼半球为晨线，故20°W为昏线（与赤道交点所在经线为6:00），160°E为晨线（与赤道交点所在经线为18:00），且北京正午人影将越来越长，太阳高度角越来越小，说明太阳直射点不断南移。通过计算北京时间（120°E）为9月23日3：20（东加西减。经度差15°，时间差1小时）。故选C.

阅读理解

阅读理解。

                                               Traveling Can Help Solve the Crime Problems
         Americans think that travel is good for you. Some even think it can help to solve one of the country's
worst problems-crime.
         Crime worries a lot of people. Every year, the number of crimes goes up and up. They often come from
sad homes, with only one parent at all. There are problems with alcohol (酒精)and drugs (麻醉药).
         There are many young criminals in prison. But prison doesn't change them 60 to 70 percent will go back
to crime when they come out of prison.
         One man, Bob Burton, thought of a new idea. In the old days, young men had to live a hard life on the
road. They learnt to be strong and brave, and to help their friends in time of danger. This helped them to grow
into men. So Bob started "Vision Quest".
         He takes young criminals on a long, long journey with horses and wagons (四轮马车)3,000 miles through
7 states. They are on the road for more than one year.
        The young people on "Vision Quest" all have bad problems. Most of them have already spent time in
prison. This is the last chance.
         It's hard work on the road. The day starts before the sun comes up. The boys and girls have to feed the
horses. Some of them have never loved anyone before. But they can love their horses. That love can help them
to a new life.
         Not all young people in "Vision Quest" will leave crime behind them. 30 or 40 percent will one day be in the prison again. But that's a lot better than 60 or 70 percent. Bob is right. Travel can be good for you.
         Even today, Americans still say, "Go west, young men."

1. According to the passage, travel is good for you because it can _________.

A、get rid of crimes completely
B、change the way of life
C、help to reduce criminals
D、not build up your body

2. Which of the following is not the character of the criminals?

A、A lot of them are young.
B、They often have not a good family.
C、They may often drink wine too much and take drugs.
D、They like traveling far away from their homes.

3. Which of the following is true?

A、Young criminals become less and less as time goes by.
B、All criminals do better after they come out of prison.
C、Many young criminals are changed better by Bob's new idea.
D、Young criminals all lead a happy life on "Vision Quest".

4. The young people on Vision Quest have to .

A、work all day and night
B、get up early and feed the horses
C、love their horses
D、live a comfortable life

5. The underlined sentence "Go west, young men." in the last paragraph means .

A、people can learn to be strong and brave on a long journey
B、people can learn how to help others in time of danger on a long journey
C、travel can help them to grow into men
D、All above

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