若一组数据a1，a2，…，an的平均数为4，则3a1-1，3a2-1，…，3an

阅读理解。

     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(毒品).

     There are many young criminals in prison . But prison doesn’t change them-60 to 70 percent will go

back to crime after they are 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 be in the

prison again . But that’s a lot better than 60 to 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. change the way of life      

B. help to reduce criminals  

C. make your body strong      

D. get rid of crimes completely

2. Criminals’ characters include_______ .

a. A lot of them are young .  

b. They often don’t have a good family .  

c. They may often drink wine too much and take drugs .

A. a , b        

B. a , c      

C. b , c        

D. a , b , c

3. The young people on “Vision Quest ” have to _______ .

A. get up early and feed the horses      

B. sleep together with their horses  

C. love a comfortable life             

D. work all day and all night

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

A. travel can help young men learn how to feed horses  

B. people can learn to be strong and brave on a long journey

C. people can learn how give up smoking on their journey

D. scenes in the west are very beautiful

5. Which of the following is true ?

A. Many young criminals are changed by Bob’s new idea .

B. Young criminals all live a happy life on “Vision Quest”

C. Young criminals are becoming fewer and fewer now

D. All criminals do better after they come out of prison

下列婚育方式中，违反婚姻法和优生原理的是

A．同龄结婚

B．同姓结婚

C．近邻结婚

D．近亲结婚

中国古代的科学著作大多是经验型的总结，而不是理论型的探讨，所记各项发明都是为了解决国家与社会生活中的实际问题，而不是试图在某一研究领域获得重大突破。从研究方法上来说，中国科技重视综合性的整体研究，重视从总体上把握事物，而不是把研究对象从错综复杂的联系中分离出来，独立研究它们的实体和属性，细致探讨它们的奥秘。这使得中国古代的科学技术没有向更高层次发展。 这段文字重在说明( )。

A．研究方法的缺陷使中国古代科技长期停滞不前

B．解决实际问题是推动中国古代科技发展的动力

C．中国古代的科学研究关注的重点及其历史背景

D．中国古代的科技水平没有长足进步的根本原因

慢性酒精中毒患者最常出现的记忆障碍的特点是（）

A.新近记忆和短时记忆无障碍

B.不能形成新记忆，已形成的记忆不受影响

C.逆行性遗忘

D.不能回忆以前发生的事情

E.与海马和颞叶皮层损失引起的记忆障碍截然不同

王某明知是宣扬恐怖主义、极端主义的图书、音频视频资料而收藏，情节严重，应对其以非法持有宣扬恐怖主义、极端主义物品罪追究刑事责任。