桥梁的基本组成应分为（）。 A.桥跨结构 B.墩台 C.支座 D.锥形护坡 E.涵洞

哈伯因发明了由氮气和氢气合成氨气的方法而获得1918年诺贝尔化学奖。现向一密闭容器中充入1mol N₂和3mol H₂，在一定条件下使该反应发生。下列有关说法正确的是[ ]

A．达到化学平衡时，N₂将完全转化为NH₃

B．达到化学平衡时，正反应和逆反应的速率都为零

C．达到化学平衡时，N₂、H₂和NH₃的物质的量浓度一定相等

D．达到化学平衡时，N₂、H₂和NH₃的物质的量浓度不再变化

“铁人”王进喜克服重重困难打出大庆第一口油井，焦裕禄为改变兰考面貌献出生命，邓稼先完成我国第一颗原子弹的理论设计方案，他们的事迹出现在

A．新中国成立时期

B．探索建设社会主义道路时期

C．“ * * ”时期

D．社会主义现代化建设新时期

在思想品德总复习课上，老师通过多媒体展示了下列图示。回答1～2题：

1．从A点到E点这一段时间内我国各族人民的共同理想是[ ]

A．把我国建设成为全面的小康社会

B．实现各尽所能、各取所需的 * * 主义社会

C．实现人均国内生产总值比1949年翻两番

D．把我国建设成为富强民主文明和谐的社会主义现代化国家

2．对于D点时刻，我国的奋斗目标包括[ ]

①综合国力显著增强  

②人民富裕程度普遍提高  

③各方面制度更加完善 

④人民享有更加充分的民主权利

A．①②③         

B．②③④      

C．①③④         

D．①②③④

Stress is with us all the time. It comes from mental or emotional activity as well as physical activity. It is unique and personal to each of us. So personal, in fact, that what may be relaxing to one person may be stressful to another. For example, if you’’re a busy executive who likes to keep occupied all of the time, "taking it easy" at the beach on a beautiful day may be extremely frustrating, nonproductive, and upsetting. You may be emotionally distressed from "doing nothing." Too much emotional stress can cause physical illnesses such as high blood pressure, ulcers, or even heart disease. Physical stress from work or exercise is not likely to cause such ailments. The truth is that physical exercise can help you to relax and to better handle your mental or emotional stress.

Which of the following would be a determinant as to what people find stressful

A．Personality.

B．Education.

C．Marital status.

D．Shoe size.

异常骨显像根据放射性聚集的多少分为（）

A．放射性浓聚和放射性缺损

B．弥漫性和局灶性病变

C．点状、圆形、条形、片状和团块状等

D．单发和多发

E．代谢增高或减低