定量加油操作的步骤是:()。A、提枪启机-加油-收枪-停机 B、预置-提枪启机-加油

题型:单项选择题

问题:

定量加油操作的步骤是:()。

A、提枪启机-加油-收枪-停机

B、预置-提枪启机-加油-收枪-停机

C、提枪启机-预置-加油-收枪-停机

D、加油-收枪-停机

考点:加油站操作员考试初级加油站操作员考试初级加油站操作员考试题库
题型:单项选择题

阅读理解。

                                                                                                                                  108 Wensan Road

                                                                                                                                  London, 85 A 100

                                                                                                                                  England

                                                                                                                                  March 1st, 2008 

Dear Kate,

    I am writing to you in English. I hope you can understand it.

    I love studying in London and I have many new friends. Most of them are my classmates. From Monday to

Friday, we have Chinese, math, physics and P.E. in the morning. I like Chinese and physics, because they're

interesting. I don't like math. It's too boring. At noon, I have to have lunch at school because my home is far

from my school. We usually have two classes in the afternoon, art and politics. We finish our classes at 3:30

p.m. After school, my friends and I always play soccer on the playground. And then we go home by bus.

    On weekends, we have no classes. We often go to the park and sometimes we go to the movies in the

evening. We see movies twice a month. I like some famous stars like Jackie Chan.

    Oh, I have no time to write more. Please write back soon.

    Best wishes, 

                                                                                                                                            Wang Gang

1. Where is the writer studying? [ ]

A.In America.

B.In China.

C.In England.

D.In Canada.

2. How many classes does Wang Gang have every weekday? [ ]

A.Six.

B.Four.

C.Two.

D.No classes.

3. The writer doesn't like _____ at all, because it's too boring. [ ]

A.Chinese

B.art

C.movie

D.math

4. How does the writer go home every day? [ ]

A.On foot.

B.By bike.

C.By bus.

D.By car.

5. The writer and his friends go to the movies _____. [ ]

A.once a week

B.once a month

C.twice a week

D.twice a month

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有一套小说分为上、中、下三册,如果将它们任意地陈列在书架的同一层上,各册自左至右或自右至左恰好成上、中、下次序的概度为多少?并写出具体的解题过程.

题型:单项选择题

能满足低压油气层钻井、修井作业需要的钻井液体系是()。

A、充气钻井液

B、盐水钻井液

C、加重钻井液

D、都能满足

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软X线摄影主要是利用X射线的()

A.光电吸收

B.康普顿吸收

C.电子对效应

D.光核反应

E.相干散射

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数据库管理系统中,为了保证事务的正确执行,维护数据库的完整性,要求数据库系统维护以下事务特性:原子性、______、隔离性和持久性。

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