转子发动机的一个缺点是噪声大.

在城市供热管网的分类中，根据（）划分，可分为开式和闭式两种。

A.热源与管网之间的关系

B.输送介质的不同

C.平面布置类型

D.用户对介质的使用情况

2013年5月15日上午8时起，深圳警方陆续接到深圳机场报警，称多地机场先后收到关于深圳航空ZH9243、ZH9866、ZH9889、吉祥航空HO1111、东方航空MU2325航班的安全威胁电话，导致上述航班备降、返航或推迟起飞。警方于16日凌晨3时15分在东莞市常平镇一出租屋内将犯罪嫌疑人王某亮抓获，经初步审查，王某亮对捏造事实、恶意拨打电话威胁航班安全的事实供认不讳。如果写一份抵制电话谣言的倡议书，你认为恰当的论点是

(　　)。

①公民权利有真实性，国家应当保障公民言论自由　

②公民既是权利的主体，又是义务的主体　

③自由是法律的前提，法律是自由的保障　

④权利和义务是对等的，都是实现人民利益的手段

A．①②

B．①④

C．②③

D．③④

用火焰原子吸收光谱法测定空气中的三氧化铬，以微孔滤膜采样，高氯酸-硝酸混合消解液消解滤膜，由于铬与高氯酸会生成铬酰氯，温度高后会挥发损失，所以消解温度应低于（）

A.200℃

B.250℃

C.300℃

D.270℃

E.350℃

My Space and other Web sites have unleashed a potent new phenomenon of social networking in cyberspace, (1) at the same time, a growing body of evidence is suggesting that traditional social (2) play a surprisingly powerful and under-recognized role in influencing how people behave.

The latest research comes from Dr. Nicholas A. Christakis, at the Harvard Medical School, and Dr. James H. Fowler, at the University of California at San Diego. The (3) reported last summer that obesity appeared to (4) from one person to another (5) social networks, almost like a virus or a fad. In a follow-up to that provocative research, the team has produced (6) findings about another major health (7) : smoking. In a study published last week in the New England Journal of Medicine, the team found that a person’s decision to (8) the habit is ply affected by (9) other people in their social network quit—even people they do not know. And, surprisingly, entire networks of smokers appear to quit virtually (10)

For (11) of their studies, they (12) of detailed records kept between 1971 and 2003 about 5,124 people who participated in the landmark Framingham Heart Study. Because many of the subjects had ties to the Boston suburb of Framingham, Mass. , many of the participants were (13) somehow—through spouses, neighbors, friends, co-workers—enabling the researchers to study a network that (14) 12,067 people.

Taken together, these studies are (15) a growing recognition that many behaviors are (16) by social networks in (17) that have not been fully understood. And (18) may be possible, the researchers say, to harness the power of these networks for many (19) , such as encouraging safe sex, getting more people to exercise or even (20) crime.

14（）

A.totaled

B.increased

C.summed

D.added

在组织机构的设置与管理中，应严格遵循原则是：（）

A.以事定职

B.以职选人

C.行政官员彼此之间人为地制造工作原则

D.增加工作量的法则