假设在射线强度(指射入灵敏体积的射线数目)为X,电离室工作电压为V时,电离室工作在饱

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问题:

假设在射线强度(指射入灵敏体积的射线数目)为X,电离室工作电压为V时,电离室工作在饱和区,输出脉冲信号的幅度为A。若保持其它因素不变,只是增大射线强度,例如变为2X,则输出脉冲信号的幅度是否一定为A?如果不是,原因是什么?通过什么办法可以使输出的幅度成为A?我们在这里讨论的是气体电离室的什么特性?

考点:核科学技术核辐射物理与探测核辐射物理与探测题库
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下列各分子中,所有的原子都满足最外层为8电子结构的是 [ ]

A.BeCl2

B.PCl3

C.PCl5

D.N2

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Alcohol is often taken as a symbol of a special celebration or as a sign of friendship. So it is       to see people toasting with a large glass of alcohol to the health or fortune. Unfortunately, every year, alcohol also ruins thousands of lives and destroys many happy families.
Some people drink alcohol to     their tension or pain. They mistakenly think that through drinking, they can     from their problems and worries. But it is never a    . During those hours of drinking, alcohol only numbs their senses and makes them forget their worries. However, when they wake up, their problems are still unsolved.
A     alcohol drinker is running the great risks of getting heart diseases and liver failure. Too much alcohol taken into the body system, death will     occur. Alcohol also affects unborn babies disastrously. Those pregnant mothers with     alcohol in their blood system risk causing their unborn babies to suffer from defects (缺陷) at birth.    , babies are innocent victims due to their mothers’ mistakes. Therefore they should be extremely cautious of any alcohol and it is better to     all drinking during pregnancy.
Drunken driving is one of the worst     of alcohol abuse. Every year, many lives are lost due to    driving on roads and highways. A drunk driver cannot see and judge the distance clearly and will find it difficult to control his vision and     on the road, so he fails to control over his reflexes. That is how accidents occur. Not only does he hurt himself but also other innocent road users.
小题1:
A.normalB.idealC.commonD.regular
小题2:
A.increaseB.createC.produceD.relieve
小题3:
A.differB.escape C.solveD.cancel
小题4:
A.solutionB.successC.factD.decision
小题5:
A.socialB.addicted C.heavyD.light
小题6:
A.seldomB.hardly C.eventuallyD.strongly
小题7:
A.properB.excessiveC.littleD.no
小题8:
A.After allB.Above allC.First of allD.All in all
小题9:
A.run outB.leave outC.carry outD.cut out
小题10:
A.reasons B.effectsC.causesD.examples
小题11:
A.normalB.careless C.dangerousD.drunken
小题12:
A.judgmentB.patienceC.emotionD.imagination
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二十四节气是中国古代订立的一种用来指导农事的补充历法,从二十四节气的命名可以看出,节气的划分充分考虑了季节、气候、物候等自然现象的变化。二十四节气中反映农作物成熟的有(   )

A.谷雨、小满

B.惊蛰、谷雨

C.白露、霜降

D.小满、芒种

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活度 答案:

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催乳师从业的基本条件()

A、身体健康

B、仪表整洁;性格开朗

C、尊重雇主;热情和蔼

D、勤奋好学;精益求精

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