经营环境包括( )。A．企业环境 B．内部环境 C．外部环境 D．市场因素 E．非

(12分)下列有机物化合物中，有多个官能团。

（1）可以看作醇类的是：               ；（2）可以看作酚类的是                 ；

（3）可以看作羧酸类的是：             ；（4）可以看作酯类的是：               ；

（5）可以看作醛类的是：               ；（6）可以看作醚类的是：               。

谵语可表现为

A．语无伦次，狂躁妄言
B．语无伦次，神志不清
C．语言重复，声低断续
D．语言错乱，说后自知
E．自言自语，见人则止

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) .

某建筑公司(乙方)于某年4月20日与某厂(甲方)签订了修建建筑面积为3000m²工业厂房(带地下室)的施工合同。乙方编制的施工方案和进度计划已获工程师批准。该工程的基坑开挖土方量为4500m³，假设直接费单价为4.2元/m³，综合费率为直接费的20%。该基坑施工方案规定：土方工程采用租赁一台斗容量为1m³的反铲挖掘机施工(租赁费450元/台班)。甲、乙双方合同约定5月11日开工，5月20日完工。在实际施工中发生了如下事件：
事件1：因租赁的挖掘机大修，晚开工2天，造成人员窝工10个工日；
事件2：施工过程中，因遇软土层，接到工程师5月15日停工的指令，进行地质复查，配合用工15个工日；
事件3：5月19日接到工程师于5月20日复工令，同时提出基坑开挖深度加深2m的设计变更通知单，由此增加土方开挖量900m³；
事件4：5月20日～5月22日，因下了一场几十年一遇的大雨迫使基坑开挖暂停，造成人员窝工10个工日；
事件5：5月23日用30个工日修复冲坏的永久道路，5月24日恢复挖掘工作，最终基坑于5月30日挖坑完毕。
问题：
(1)建筑公司对上述哪些事件可以向厂方要求索赔，哪些事件不可以要求索赔并说明原因。
(2)每项事件工期索赔各是多少天总计工期索赔是多少天
(3)假设人工费单价为23元/工日，因增加用工所需的管理费为增加人工费的30%，则合理的费用索赔总额是多少

PG-PL调速器主要由（）组成。

A.供油系统

B.调速器的导向阀柱塞

C.油动机

D.缓冲系统

E.变速机构