人类可以通过化学反应获得能量,如利用沼气燃烧可以煮饭、炒菜等,请你举出两例利用化

题型:填空题

问题:

人类可以通过化学反应获得能量,如利用沼气燃烧可以煮饭、炒菜等,请你举出两例利用化学反应获得能量的事例。①                         ;②                    

考点:化学反应中的能量变化
题型:填空题

A 70-year study of personality suggests that pessimism is a risk factor for early death, especially among men.

  The study results also indicate that pessimism can be linked to increased risk for sudden death from accidents or violence, according to the report published in the March issue of Psychological Science.

  Christopher Peterson of the University of Michigan and his colleagues analyzed data from the Terman Life-Cycle Study, which began by studying California public-school children with high IQs in 1921 and followed them through their life. Most of the 1,528 children were teenagers when the study began. Those still living are now in their 80s. In 1936 and 1940, participants were asked to complete a questionnaire designed to obtain information about difficult life events and their effect on overall outlook. One such question was, “What do you regard as your most serious fault of personality or character?”

  Pessimists were defined as fatalistic(宿命论的)people who tend to blame themselves when things go wrong and who believe that one bad event can ruin the rest of their life. They also tend to expect bad things to happen to them and feel that they have little or no ability to change their situation.

  Males were more likely than females to be classified as pessimistic. Compared with individuals with a more cheerful and optimistic outlook, pessimists were more likely to die from accidents and violence (including suicide).

  A pessimistic personality may lead to poor problem-solving ability, social difficulties and risky decision-making. Taken together, these variables put the pessimist at higher risk of untimely(不适时的) death, say the researchers. Such a person is less likely to avoid or escape potentially dangerous situations, the researchers concluded. “A pessimistic way of thinking in which people worry too much about bad events, predicts untimely death decades later,” according to Peterson.

小题1:According to the passage, you may be a pessimistic person, if one failure makes you feel________.

A.other people have been unfair to you.

B.other people will help you.

C.you cannot change a bad situation.

D.you can do better next time.小题2:According to the passage, pessimists may feel all of the following EXCEPT________

A.helpless when faced with difficulties.

B.cheerful when faced with troubles.

C.hopeless when one bad event occurs.

D.guilty when things go wrong.小题3:Which of the following statements is true, according to the passage?

A.Pessimists believe that everything in life depends on fate.

B.There are more pessimists among women than among men.

C.Most pessimists will end up committing suicide.

D.All pessimists will eventually die from accidents.小题4:The Terman Life-Cycle Study is a research program that studies________.

A.people over 70 years old.

B.people since their childhood.

C.pessimistic people over 80 years old.

D.only younger people.小题5:The analysis made by Christopher Peterson and his colleagues shows that pessimistic people________

A.will die from violence if they learn to be optimistic.

B.will more likely die from violence than optimistic people.

C.will die from violence because their IQs are low.

D.will die untimely if they are not able to learn to be cheerful and optimistic.

题型:填空题

气体在绝热的容器里被压缩时,下列说法正确的是()。

A、压强增加,温度降低

B、压强增加,温度升高

C、压强减少,温度降低

D、压强减少,温度升高

题型:填空题

电气照明系统安装中,一般灯具安装不符合要求的是()。

A.吊链灯具用的灯线不应受拉力,灯线宜与吊链编插在一起

B.软线吊灯的两端应做保险扣

C.同一室内成排安装的灯具,其中心偏离可大于5mm

D.每个照明回路的灯和插座数不宜超过25个(不包括花灯回路)

题型:填空题

股骨闭合性骨折后,体温可能出现的情况

A.上午正常,下午高热
B.通常不超过38℃
C.时高时低不规则
D.常在38.5℃以上
E.一般低于正常

题型:填空题

对流量相对稳定的长输管线,自动取样时宜先采用()取样。

A.时间比例

B.流量比例

C.连续

D.间歇

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