门诊调剂室发生差错事故的主要原因是：A．责任心不强，玩忽职守 B．专业技术水平不高

函数y=x（x＞0）的图象在（　　）

A．第一象限

B．第二象限

C．第三象限

D．第四象限

通过对机器外壳温差的变化可以掌握其（）.

Today’s lecture is about the mass (1) of the world’s population. There are two major (2) why people are moving to cities. The first reason is (3) . People are moving to the cities because that’s where they can find (4) and earn money. The second reason for the move to cities has to do with (5) of life issues: comfort and (6) . Cities often offer better (7) . And then for many, city life is just more (8) . An interesting consequence of urbanization is that the average (9) of people in the countryside is increasing, while that of the cities is (10) .
Three key (11) can be identified in our cities. First of all, they’re getting bigger. Most cities are bigger now than ever before. Cities are also changing shape. They’re getting (12) , because land is getting more and more expensive. (13) have become a symbol of modern cities.
Cities are also changing shape in other ways. The (14) Model and the (15) Nuclei Model are probably more typical of the cities we know today. They show the urban (16) that’s occurring in contemporary cities.
The third change is that our cities are breaking up into (17) communities, often by (18) group or (19) level. This often means that people stay within their community and do not come into contact with others from different (20) .

下列选项中，不属于安全生产责任制度的内容是______。

A．生产经营单位各级领导安全生产责任权利和义务
B．各职能部门安全生产责任权利和义务
C．管理人员安全生产责任权利和义务
D．生产经营单位定期安全分析会议