分子筛纯化器的切换系统可能发生什么故障?应如何处理?

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问题:

分子筛纯化器的切换系统可能发生什么故障?应如何处理?

考点:制氧工考试制氧中级工制氧中级工题库
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自动人行道的额定速度不应超过()

A.>1.0m/s

B.0.75m/s

C.0.5m/s

D.0.25m/s

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不能减少散射线的措施是()

A.加大物片距

B.加大焦片距

C.使用滤线器

D.减少照射野

E.使用增感屏

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按客户在客户关系中的历史价值和潜在价值对客户进行分类,这种分析方法简称( )

A.客户组合分析方法

B.波士顿矩阵分析方法

C.市场细分

D.客户关系管理价值链分析方法

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The word doping is probably from the Dutch word dop, the name of an alcoholic drinks make of grape skins used by Zulu soldiers in order to encourage their bravery in battle. The term became current around the turn of the 20th century, originally referring to illegal drugging of racehorses. In 1928 the International Amateur Athletic Federation (IAAF) became the first to ban the use of doping. A reliable test method was finally introduced in 1974.

The practice of enhancing athletes’ performance through foreign substance or other artificial means, however, is as old as competitive sport itself. The most famous doping case of the 1980s concerned Ben Johnson, the 100-meter champion who tested positive for stanozolol(司坦咗醇) at the Olympic Games in Seoul, 1988.

The main front in the anti-doping war has rapidly shifted to blood doping since 1970s. Blood doping is the practice of adding red blood cells to the bloodstream in order to improve athletes’ performance. The blood is usually processed in order to create a concentration of red blood cells, and then freeze them until needed for transfusion(输血) back into the athlete shortly before the event. The extra red blood cells will deliver more oxygen and other essential elements to the athlete’s muscle tissues.

Just like any other problem, the only way to solve it is through education. Many high school sports programs now have people come in to talk to them about out the dangers of performance-enhancing drugs. Young players must be fully clear on the rules and what substances are banned. The NCAA (National Collegiate Athletic Association) has an easily accessible list of what substances are banned, how they are tested for and why they are banned on its website. This way, young players are clear on what they can put in their bodies. This is also a good way to educate players on the danger of the substances they may be tempted to use.

小题1:The word “enhancing” in the first sentence of the second paragraph means “_____”.

A.showing

B.directing

C.upsetting

D.improving小题2:What can we know from the third paragraph?

A.Blood doping is transferring one man’s blood into another

B.Only blood doping exists in the anti-doping war in the 1970s.

C.Blood doping is easy to be found and controlled by organizations.

D.More oxygen in the blood helps improve an athlete’s performance.小题3:The word “people” in the second sentence of the fourth paragraph probably refers to _____.

A.teachers who teach P.E. lessons at school

B.experts who do research in doping

C.young people easy to be addicted to doping

D.athletes involved in doping小题4:Which statement best matches the last paragraph?

A.Prevention is better than cure.

B.Reading is to the mind what exercise is to the body.

C.The best horse needs breaking, and the cleverest child needs teaching.

D.A little learning is a dangerous thing.

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