自始至终全部由关键工作组成的线路为关键线路,或线路上总的工作( )最长的线路为关键

题型:单项选择题

问题:

自始至终全部由关键工作组成的线路为关键线路,或线路上总的工作( )最长的线路为关键线路。

A.持续时间
B.总时差
C.最迟开始时间
D.最迟完成时间

考点:一级建造师建设工程项目管理建设工程项目管理
题型:单项选择题

阅读理解。

     Having a part-time job is an important part of growing up for American teenagers. It can teach them

important skills that will be useful for the rest of their lives. And many teenagers find that making their own

money gives them a sense of pride and freedom.

     American teenagers are allowed to do part-time jobs at the age of 14. During the school year, teenagers

may go to work a few times a week after school, and work for longer at weekends.

     In summer, top part-time jobs for teenagers include at camps, swimming pools and amusement parks.

These jobs are great for those who want to be active and have fun while making money.

     Some of the most stressful jobs include teaching, nursing, and police work. These skills help to prepare

teenagers for their later lives. When they grow up, the students with work experience are more likely to

succeed than those without work experience.

     A favorite job for many teenagers is babysitting, and they can start before the age of 14 if their parents

agree. As long as they stay in the house and make sure the kids are okay, babysitters can do their homework,

watch TV, or talk on the phone with friends. After the kids go to bed and before the parents come home,

babysitters have lots of freedom.

     It can be stressful to balance school, homework, and a part-time job. However, many American teenagers

value their work experience and the skills they get from the job.

1. Why do American teenagers like to have a part-time job?

A. Because they don't want to be stressed out.

B. Because they can learn skills and get money.

C. Because they can get a good job in the future.

D. Because they can do anything they like.

2. Which kind of part-time job is less stressful for American teenagers?

A. Working at police.

B. Nursing

C. Working at camps.

D. Teaching.

3. Which kind of part-time job can a 13-year-old girl do in America?

A. Working at parks.

B. Working at a swimming pool.

C. Looking after babies.

D. Doing the dishes in a restaurant.

4. What's the meaning of the underlined word "value"?

A. 喜欢

B. 追求

C. 向往

D. 珍视

题型:单项选择题

纵向分辨力直接与( )有关。

题型:单项选择题

当发生胶带撕断时,要打紧急停机信号,立即紧急停机,并将胶带上的()清理干净。然后开动涨紧绞车松开机头储带仓的胶带。

A.载煤

B.杂物

C.矸石

D.水煤

题型:单项选择题

检查时在龈缘可见中等菌斑,菌斑指数记分为

A.0

B.1

C.2

D.3

E.4

题型:单项选择题

心理测验按测验的内容可分为两大类,一类是能力测验,另一类是()。

A.人格测验

B.成就测验

C.性向测验

D.情商测验

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