[背景材料] 某房地产开发商开发一商务楼，地下一层为停车场，地上28层，建筑面积5

2011 年3月日本大地震引发了核泄漏事故。事故发生时，放射性原子氮-16可能短暂时存在。氮-16的质子数为7，中子数为9。下列关于氮-16的说法正确的是（   ）

A．核外电子数9

B．相对原子质量为14

C．和普通氮原子是相同的原子

D．和普通的氮原子属于同种元素

质量为100g的球从1.8m高处落到水平板上，又弹回到1.25m的高度，在整个过程中重力对球所做的功为______，球的重力势能变化了______J。（g取10 m/s²）

前 * * 裂伤尿管引流时间为（）

A.1周

B.6周

C.3个月

D.3～6个月

E.2～4周

The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is (1) to say it anyway. He is that (2) bird, a scientist who works independently (3) any institution. He helped popularize the idea that some diseases not (4) thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested.

(5) he, however, might tremble at the (6) of what he is about to do. Together with another two scientists, he is publishing a paper which not only (7) that one group of humanity is more intelligent than the others, but explains the process that has brought this about. The group in (8) are a particular people originated from central Europe. The process is natural selection.

This group generally do well in IQ test, (9) 12-15 points above the (10) value of 100, and have contributed (11) to the intellectual and cultural life of the West, as the (12) of their elites, including several world-renowned scientists, (13) . They also suffer more often than most people from a number of nasty genetic diseases, such as breast cancer. These facts, (14) , have previously been thought unrelated. The former has been (15) to social effects, such as a p tradition of (16) education. The latter was seen as a (an) (17) of genetic isolation. Dr. Cochran suggests that the intelligence and diseases are intimately (18) . His argument is that the unusual history of these people has (19) them to unique evolutionary pressures that have resulted in this (20) state of affairs.

16（）

A.assessing

B.supervising

C.administering

D.valuing

谵妄综合征的主要特征为（）。

A．意识障碍昼轻夜重 

B．幻觉 

C．注意涣散 

D．记忆减退 

E．错觉