试述油品产生静电的原因是什么?

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问题:

试述油品产生静电的原因是什么?

考点:炼油储运操作工考试炼油储运操作工考试题库
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男性,67岁,陈旧性前问壁心肌梗死3年,近日心慌、心悸,多次心电图均提示频发多源室性期间收缩,其中有一次记录到由4个宽大畸形QRS波群组成的一组短阵室性心动过速。为估计其预后首选的检查项目是

A.24小时动态血压
B.24小时动态心电图
C.心室晚电位
D.食管心房调搏或心内电生理检查

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阅读理解

     The evidence for harmony may not be obvious in some families. But it seems that four out of five

young people now get on with their parents, which is the opposite of the popularlyheld image of unhappy

teenagers locked in their room after endless family quarrels.

     An important new study into teenage attitudes surprisingly shows that their family life is more

harmonious than it has ever been in the past."We were surprised by just how positive today's young

people seem to be about their families, "said one member of the research team."They're expected to be

rebellious(叛逆的)and selfish but actually they have other things on their minds; they want a car and

material goods, and they worry about whether school is serving them well.There's more negotiation(商

议) and discussion between parents and children, and children expect to take part in the family

decisionmaking process.They don' t want to rock the boat. "

     So it seems that this generation of parents is much more likely than parents of 30 years ago to treat

their children as friends."My parents are happy to discuss things with me and willing to listen to me," says

17yearold Daniel Lazall. "I always tell them when I'm going out clubbing.As long as they know what I'm

doing,they're fine with it."Susan Crome, who is now 21, agrees."Looking back on the last 10 years, there was a lot of what you could call negotiation. For example, as long as I'd done all my homework,I could

go out on a Saturday night. But I think my grandparents were a lot stricter with my parents than that."

     Maybe this positive view of family life should not be unexpected. It is possible that the idea of teenage

rebellion is not rooted in real facts. A researcher comments, "Our surprise that teenagers say they get

along well with their parents comes because of a brief period in our social history when teenagers were

regarded as different beings. But that idea of rebelling and breaking away from their parents really

happened during the 1960s when everyone rebelled. The normal situation throughout history has been a

smooth change from helping out with the family business to taking it over."

1. What is the popular images of teenagers today?

A. They worry about school.

B. They dislike living with their parents.

C. They have to be locked in to avoid troubles.

D. They quarrel a lot with other family members.

2. The study shows that teenagers don't want to ________.

A. share family responsibility

B. cause trouble in their families

C. go boating with their family

D. make family decisions

3. Compared with parents of 30 years ago,today's parents______.

A. go to clubs more often with their children

B. are much stricter with their children

C. careless about their children's life

D. give their children more freedom

4. According to the author, teenage rebellion________.

A. may be a false belief

B. is common nowadays

C. existed only in the 1960s

D. resulted from changes in families

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真菌的繁殖方式分为()和(),分别产生()、()。

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下列不是斗篷野需要保护的重要器官的是()

A.喉

B.肱骨头

C.肺

D.心脏

E.胃

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投资组合理论认为,对于相同的宏观经济环境变化,不同投资项目的收益会有不同的反应。( )

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