有喷射软管的灭火器或储压式灭火器在使用时,能不能放开压把?为什么?

题型:问答题 简答题

问题:

有喷射软管的灭火器或储压式灭火器在使用时,能不能放开压把?为什么?

考点:中石化钻井一公司关键岗位人员安全考试测井勘探开发仪修工测井
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根据短文内容,从下框的A~F选项中选出能概括每一段主题的最佳选项,并在答题卡上将该选项涂黑。选项中有一项为多余项。
A. Be well-organised.
B. Close with a Q & A.
C. Don’t be contradictory.
D. Bring it to a specific end
E. Speak slowly and pause.
F. Drop unnecessary words
Speaking to a group can be difficult, but listening to a bad speech is truly a tiresome task—especially when the speaker is confusing. Don’t want to confuse your audience? Follow these suggestions:
小题1:
When it comes to understanding new information, the human brain needs a little time. First, we hear the words; then, we compare the new information to what we already know. If the two are different, we need to pause and think. But a breathless speaker never stops to let us think about what he or she is saying and risks confusing us. Slow it down. And breathe.
小题2:
Sometimes we all start a sentence one way and then switch directions, which is very difficult to follow. When you confuse your listeners with opposing information, you leave the audience wondering what part of the information is right and what part they should remember. Instead of relying and keeping correcting yourself, work to get the facts clear and straight.
小题3:
Jumping from point to point as it comes to your mind puts the onus (责任)on your listeners to make up for your lack of organisation. And it’s confusing for them to listen, reorganise, and figure out what you’re saying all at once. But going smoothly from one point to the next helps them understand information more easily. You can arrange things from beginning to end, small to large, top to bottom or by some other order. Just be sure to organise. 
小题4:
Repeated use of um, ah, like, you know and some other useless noises can drive an audience crazy. It makes the speaker sound uncertain and unprepared, and it can leave listeners so annoyed that they can’t pay attention. Recently I attended a speech that was marked by so many ums that audience members were rolling their eyes. Was anybody grasping the intended message? Um, probably not.
小题5:
Many speakers finish up their speeches with question-and-answer (Q & A) sessions, but some let the Q & A go on without a clear end. The audience is often left confused about whether the meeting is over and when they can get up and leave. Do your listeners a favour by setting a time limit on questions, and close your speech with a specific signal—even if it’s something simple like, “If you have any more questions, you know where to reach me.”
Or even more to the point, conclude your speech with “Thanks for your time. ”
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关于通电导体在磁场里受力方向与电流方向和磁感线方向之间的关系,下列说法中错误的是(  )

A.电流方向反向时,导体受力方向改变

B.磁场方向反向时,导体受力方向改变

C.电流方向和磁场方向同时反向,导体的受力方向改变

D.电流方向和磁场方向同时反向,导体的受力方向不变

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现有天平(含砝码)、量筒、小塑料块(能放入量筒中;不吸水;密度小于待测液体的密度),只用这些器材测定未知液体的密度.要求:(1)写出主要实验步骤;(2)写出计算液体密度的表达式.

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超我

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油气主要储存在()的颗粒之间的孔隙中。

A.裂缝中

B.砂岩油层中

C.溶洞中

D.断层中

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