运动员的肺容量比一般人大得多，其主要原因是 [ ] A．肺泡数量多于一般人 B．

When I was growing up, 16 was always a magical age, a symbol of maturity, responsibility and of course more independence and freedom.  I sat through the hours of Driver’s Ed classes eager to get out on the road. I couldn’t wait to get my driver’s license.

But it’s a different story for today’s teens. In January, the U.S. Department Transportation released 2012 data that showed only 30.7 percent of U.S. teens got their license at age 16, Twenty years before, that number was almost 45 percent.

There are numbers of reasons for the fall – off. The growing responsibilities like paying for insurance and high gas prices discourage teens from getting behind the wheel. Plus, many teens today are so busy with homework, endless hours of activities and part-time jobs, that finding the time for Driver’s Ed classes may be more difficult that ever.

In addition, many states have raised the driving age, or restricted when teens can drive and who they can have in the car. Parents may also be making their own personal restrictions until they feel their teens are responsible enough to drive safely.

Driving is part of the American culture, but it’s not the central focus like it was 25 years ago. They have so many other things to do now. One of the more interesting factors delaying teens driving might be the change of their social life. Today, teens need to look no further than Face book or other social networking sites to connect with their friends. There is simply less need, maybe less desire, to be able to grab the keys and go.

Michelle Wei got her license as a senior in high school because her digital social life made it easy not to drive. “If I couldn’t get a ride to see my friend who lives a town over,” the 19-year-old said, “I could talk on IM or Skype.”

Research has shown that these online relationships can lead to higher quality friendships, so it isn’t necessarily a bad thing. However, it’s important to find a balance. If old face-to-face friendships are good, why not drive to find them?

小题1:We can infer from the first paragraph that _______ .

A．Driver’s Ed classes allowed teens to know what maturity was

B．getting a driving license at 16 was a must for American teens

C．16 was considered an age when one could get his driver’s license

D．teens could drive on the road without taking Driver’s Ed classes小题2:What does the passage mainly talk about?

A．Desire to drive on the road declines among American teens.

B．Getting a license costs much more than ever before.

C．Social networking sites are changing the life of American teens.

D．American teens are becoming more responsible than ever.小题3:Michelle’s Wei’s example is used to explain ________.

A．why American teens are crazy about digital social life

B．what social networking websites are bringing to American teens

C．to what degree the Internet is affecting the American car culture

D．what the Internet does to help teens to get a driving license小题4: The last paragraph is reminding the readers that _______ .

A．the Internet has a bad effect on the teen’s social life

B．teens should keep a balance in choosing their lifestyle

C．actual contacts can be replaced by talking on line

D．face-to-face friendship is always the best choice

产后出血采用结扎盆腔血管止血时，首先（）

A.结扎卵巢动脉

B.结扎髂内动脉

C.结扎子宫动脉上行支

D.结扎 * * 动脉

E.结扎子宫动脉下行支

中国古代无论是奴隶制还是封建制，都受到宗法制度和宗法精神的强烈影响。它不仅是宗族凝聚力的一种保障，而且是王权的重要支柱。君权、地方行 * * 都渗透了宗法父权的因素。这是封建专制制度得以长期牢固统治的条件之一。在国家的立法中，不仅确认了有关封建宗法制度的大量内容，而且承认宗法家规具有一定的法律效力，是国法的重要补充。这段话主要支持了这样一种论点，即( )

A．宗法制度强烈地影响着中国古代的政治、立法以及司法，甚至社会生活的各个方面

B．宗法制度成为中国古代专制统治的坚强基础

C．中国古代社会，宗法精神无处不在，渗透于整个社会生活

D．宗法制度被中国古代国家立法所确认，并成为国家立法的补充

下列有关感染HIV后临床分期的叙述，正确的是（）

A.窗口期、艾滋病前期、典型艾滋病期

B.急性感染期、慢性感染期、机会性感染期

C.潜伏期、前驱期、艾滋病期、恢复期

D.急性感染期、慢性感染期、机会性感染期、恶性肿瘤期

E.急性感染期、无症状感染期、艾滋病期

包租行李车在沿中心踏板面1米以上预留不少于（）米的防火通道。