对于下列文件的物理结构,哪一个只能采用顺序存取方式 ( )。A.顺序结构 B.链接

题型:单项选择题

问题:

对于下列文件的物理结构,哪一个只能采用顺序存取方式 ( )。

A.顺序结构

B.链接结构

C.索引结构

D.Hash结构

考点:计算机等级考试数据库技术三级数据库技术笔试12
题型:单项选择题

子宫内膜异位症的典型症状为()。

A.不孕

B.月经异常

C.性交不适

D.继发性痛经

E.下腹痛

题型:单项选择题

阅读理解。

     In the United States, a family has a mother, a father and their children. But this is not the only kind of

family group. In some parts of the world, a family group has many other members. This kind of large

family is called an "extended family", or a "joint family".

     A joint family includes all living relatives of either mother's or father's side of the family. It is made up

of grandparents, parents, brothers, sisters, uncles, aunts and cousins. They live together in large dwelling(住所,寓所) or in huts built close together.

     Long ago , early man probably lived in joint families .He had to be part of a large group in order to

survive .The members of the group helped one another hunt They worked together to protect themselves

from dangerous animals and other enemies.

     In China, people lived in joint families. When a son married, he and his wife lived at his parent's house .Unmarried daughters remained at home until they married .Chinese children felt very loyal to their parents. Younger members of a joint family always took care of the older ones.

In India and Africa ,some people still live in joint families .The members of a joint family share their

earnings and property .If one member of the group becomes ill or has bad luck ,the others help him, as in

the past ,the member of the joint family offer one another help and protection .

1. A joint family is a family that ________ .  

A. only has father and mother  

B. has father, mother and their children

C. only has children            

D. has parents, children and other members

2. People lived in joint families long ago because _________ .    

A. they had to live together in order not to be killed by dangerous animals or other enemies

B. they didn't build so many houses then

C. they thought it brought bad luck to live alone

D. they thought a large family could save grain (粮食)

3. Whom did Chinese children feel very loyal to?             

A. Married sons  

B. Unmarried daughters

C. Parents        

D. Younger members

4. The best title for this passage is " ________ ".  

A. A Large Family  

B. Joint Families

C. A Family with Father, Mother and Their Children

D. Small Families

题型:单项选择题

阳证肿疡初期外敷宜用()

A.冲和膏

B.金黄膏

C.生肌白玉膏

D.生肌玉红膏

E.青黛膏

题型:单项选择题

国家法定计量检定机构是指:()。

A、有权或被授权执行强制检定的计量检定机构

B、按隶属关系进行计量传递的上级计量检定机构

C、县级以上人民政府计量行政部门依法设置的检定机构或被授权的专业性或区域性计量检定机构

D、都不是

题型:单项选择题

某城市公交企业拥有公交营运车辆1000辆,全市经营的公交线路长度为2100公里,其中有公共交通线路通过的街道长度为1500公里;该城市用地面积为400平方公里;公交公司最近提出:在公共交通车辆既定的条件下,要通过优化线网密度不断提高城市居民的出行方便程度,使乘客步行距离不超过1/2站距的服务质量要求。该城市乘客平均乘距为6公里,每条线路平均车辆数为12辆,车辆在营运线路上每完成一个周转所耗费的时间平均为60分钟。

根据上述资料,回答下列问题:

在车辆既定的条件下提高线网密度的措施会导致乘客()。

A.步行时间缩短

B.候车时间缩短

C.步行时间延长

D.候车时间延长

E.乘车时间延长

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