钻井过程中,可以人为选择和改变的因素包括()。 A.钻头和钻具 B.钻压 C.转速

题型:多项选择题

问题:

钻井过程中,可以人为选择和改变的因素包括()。

A.钻头和钻具

B.钻压

C.转速

D.水力参数

E.洗井液性能及洗井技术

考点:石油工程石油工程题库
题型:多项选择题

一压缩机分为四段,其入口压力为0.16MPa,出口压力为16.5MPa,当地大气压为0.1MPa,则其各段平均压缩比为()。

A、3.14

B、3.24

C、3.34

D、3.44

题型:多项选择题

通过捆绑鲫鱼的胸鳍或模拟实验,可以证明鲫鱼的胸鳍在游泳中的主要作用是(  )

A.没有任何作用

B.转换方向

C.产生前进的动力

D.保持鱼体平衡防止侧翻

题型:多项选择题

进行X线摄片检查是利用什么作用()
测试辐射量的闪烁晶体是利用什么作用制成的()

A.穿透作用

B.荧光作用

C.电离作用

D.感光作用

E.着色作用

题型:多项选择题

教育不直接生产物质财富,所以教育是消费事业,是社会的福利事业。

题型:多项选择题

阅读理解。

     After an earthquake most survivors can be expected to recover over time, particularly with the

support of family and friends. Some families will be able to return to their normal life quickly, while

others will have to contend with the destruction of their homes, medical problems, and injury to family

members. Children especially will need time to recover from the loss of a loved one or a pet or from the

closing down of their schools.

     Children often turn to adults for information, comfort and help. Parents should try to remain calm,

answer children's questions honestly and remain understanding when they see changes in their children's

behavior.

     Children react differently to an earthquake depending on their ages, developmental levels and former

experiences. Some will respond by withdrawing (不与人交往), while others will have angry outbursts

(爆发). Parents should remain sensitive to each child's reactions. Parents should spend time talking to

their children, letting them know that it's OK to ask questions and to share their worries. Although it may

be hard to find time to have these talks, parents can use regular family mealtimes or bedtimes for them.

They should answer questions briefly and honestly and be sure to ask their children for their opinions and

ideas. Issues may come up more than once and parents should remain patient when you answer the

questions again. For young children, parents, after talking about the earthquake, might read a favorite

story or have a relaxing family activity to help them calm down. Parents should also tell children they are

safe and spend extra time with them. They could play games outside or read together indoors. Most

importantly, be sure to tell them you love them.

1. What's the passage mainly about?

A. How to prepare before an earthquake strikes.

B. What to do in an earthquake.

C. How to face the loss of a loved one in an earthquake.

D. How to help children recover mentally from an earthquake.

2. The underlined phrase "contend with" in Paragraph 1 can be replaced by "______".

A. deal with

B. make up

C. put off

D. turn back

3. When children ask the same question again, parents should ______.

A. read a favorite story to comfort them.

B. ask them to help do some housework.

C. be patient and answer the question again.

D. take them out to play games.

4. Which of the following pieces of advice is NOT mentioned in the passage?

A. Keep a close watch on children's behavior.

B. Tell the children they are safe.

C. Tell the children you love them.

D. Ask educational experts for help.

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