当钻井液柱压力一定时,不同的情况井底压力是不变的。

题型:判断题

问题:

当钻井液柱压力一定时,不同的情况井底压力是不变的。

考点:钻探工考试中级钻探工中级钻探工题库
题型:判断题

1949年6月,毛 * * 在《论人民民主专政》中指出:“一边倒是孙中山的四十年经验和 * * 党的二十八年经验教给我们的,深知欲达到胜利和巩固胜利,必须一边倒……中国人民不是倒向帝国主义一边,就是倒向社会主义一边,绝无例外。”新中国在这一外交方针指导下的外交实践有

①与苏联建立外交关系②签订《中苏友好同盟互助条约》

③参加万隆会议④提出和平共处五项原则[ ]

A.①②

B.①②③

C.①②④

D.①②③④

题型:判断题
2002年诺贝尔物理学奖中的一项,是奖励美国科学家贾科尼和日本科学家小柴晶俊发现了宇宙X射线源.X射线是一种高频电磁波,若X射线在真空中的波长为λ,以h表示普朗克常量,c表示真空的光速,以E和m分别表示X射线每个光子的能量和质量,则(  )

A.E=,m=0

B.E=,m=

C.E=,m=0

D.E=,m=

题型:判断题

I got a job teaching special education at a school in Coachella, California, a desert town about 170 miles from home. It was no (1) job. Street gangs (2) around the school after dark.

"Be careful, " Dad warned me during one of my frequent weekend (3) home. He was concerned about my living (4) , but I needed to be on my own.

One evening, I stayed after school to rearrange my classroom. (5) , I turned out the light and closed the door. Then I (6) toward the gate. It was (7) ! I looked around. Everyone had gone home.

After (8) all the exits, I found just enough (9) to squeeze under a gate in the back of the school. Then I walked toward my car, parked in a field behind the building.Suddenly I heard voices. I (10) around and saw at least eight boys following me. (11) my pace, I reached into my shoulder bag to get my key. I (12) all over the inside of my handbag. But the key wasn’t (13) ! Dear Lord, please help me, I prayed (14) . Suddenly, my fingers touched a loose key in my purse. I didn’t even know if it was for my car, but I took it out and (15) it. It worked!I opened the door, slid in and locked it—just (16) the teenagers surrounded the car. Trembling , I started the engine and (17) away. When I returned to my apartment, the phone was ringing. It was my Dad. I didn’t tell him about my experience; I didn’t want to (18) him. "Oh, I forgot to tell you!" He said, "I had a (n) (19) car key made and slipped it into your purse—just (20) you ever need it.

16()

A.as 

B.after 

C.until 

D.while

题型:判断题

在数据库中能够惟一地标识一个元组的属性或属性的组合称为 ______。

A.记录

B.字段

C.域

D.关键字

题型:判断题

氨压力表安装在压力波动较大的设备、管道上时,其导压管()。

A、不必采取减震措施

B、必须采取减震措施

C、视现场情况确定是否需要减震措施

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