裂解气透平复水器的冷却水应为二次冷却水。

题型:判断题

问题:

裂解气透平复水器的冷却水应为二次冷却水。

考点:护理正副高乙烯装置操作工乙烯装置操作工题库
题型:判断题

某校化学课外活动小组对碳与氧气反应时氧气用量与产物成分的关系进行研究。 取1 2g碳与给定质量的氧气枉密闭容器中燃烧,测得以下数据:

从上表数据的变化中,你得出碳与氧气反应时,产物成分与氧气用量的关系是:     

(1)   ____________________________________________________    

(2)  ________________________________________________________     

题型:判断题

Part 4


Questions 26-45


·Read the following passage and decide which answer best fits each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.
Participation (26) high school sports is not a constitutional right. (27) , it is a privilege, paid for by taxpayers, open to students who promise to (28) certain conduct requirements on and off the field. One of these promises is to (29) from using drugs. Drug use is a serious problem among high school students. Studies show that as many as 500, 000 high school students use muscle-pumping, life-destroying substances such as steroids. Many more use illegal drugs, (30) cause discipline problems and (31) the stage for lifelong (32) .
Drug testing works to (33) and identify use. That is why drug testing is required to compete in the Olympics, the National Collegiate Athletic Association and the National Football League. (34) drug testing was instituted by these organizations, use of performance- (35) drugs has been greatly reduced. We should want (36) in schools.
Indeed, many athletes (37) testing programs, and no wonder. Without testing, athletes have to choose between drug use and a competitive disadvantage (38) the field.
Those who challenge the need for drug testing may be forgetting (39) it is like be an adolescent. Peer pressure is enormous, and one of the few effective counter-weights is the fear of being caught. More importantly, once drug use is (40) , a school can (41) to the student before he or she gets addicted or arrested.
For 25 years, public schools (42) by federal judges and civil libertarians, with results everyone can see. It is time (43) decisions on how to run public schools locally (44) officials. There is nothing unconstitutional about asking those who gain the advantages of school-sponsored athletics to contribute to the safety of other players, the integrity of the game and their own well-being. The Supreme Court should leave these programs (45) .

A.reliable

B.respectable

C.responsible

D.accountable

题型:判断题

当锅炉压力超过10MPa时,过热器安全阀动压力应为()倍工作压力。

A、1.01

B、1.02

C、1.03

D、1.05

题型:判断题

由平衡热辐射理论,目前发现的温度为3K的宇宙背景辐射中光子的数密度接近为()

A.1019/cm3

B.107/cm3

C.102/cm3

D.1/cm3

题型:判断题

货车车钩缓冲装置的作用是什么?

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