有H、D、T三种原子，各自可形成双原子分子H2、D2、T2，请填写下_爱下问搜题

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问题填空题

有H、D、T三种原子，各自可形成双原子分子H₂、D₂、T₂，请填写下列各题。

（1）标准状况下，它们的密度之比为________。

（2）相同物质的量的三种单质中，质子数之比为________。

（3）各1 g三种单质中，它们的质子数之比为________。

（4）同温同压下，1 L各单质气体中所含电子数之比为________。

答案

（1）1∶2∶3

（2）1∶1∶1

（3）6∶3∶2

（4）1∶1∶1

三种氢气分子H₂、D₂、T₂的相对分子质量分别为2、4、6，则相同状况下ρ（H₂）∶ρ（D₂）∶ρ（T₂）＝2∶4∶6＝1∶2∶3；由于是同位素组成的单质，质子数之比为1∶1∶1；质量相同时，质子数之比为∶∶＝6∶3∶2；由于同位素组成的原子数目相同的单质，具有相同的质子数。因此同温同压下，同体积的气体具有相同的分子数，也具有相同的核外电子数。

完形填空

A man hired a taxi outside the airfield．The cab had a woolen carpet with 36 lace edges．On the glass partition that 37 the driver's seat was a copy of a famous painting．Its windows were all clean．The customer was very much 38 and said to the driver，“I've never seen a nicer 39 ．”“Thank you for your praise．”the driver answered 40 ．
“The car isn't mine，”said the driver．“It belongs to the company．I used to be a 41 of cabs．When they returned，all of them were as 42 as garbage cans with cigarette butts and rubbish 43 here and there．On the seats and door-handles could be found something 44 like peanut sauce or, chewing gum．Why so? I thought if the car itself were very clean the passengers would most 45 be considerate and refrain from littering．”
“So when I got a 46 to be a taxi-driver，I began 47 my idea into practice-to tidy and 48 the car． Now before a new passenger gets on my car，I'd make a cheek and be sure it is in good order．When my car 49 after a day's work，it always remains 50 ．”
When doing a thing，one makes efforts and wants to see the result．To change others，one has to make twice the 51 but get half the result．To change oneself is the other way round-more fruit with less effort．One had better ask oneself why one makes 52 on others much more than on oneself． 53 you take enough care to do as best you can for other people's sake，your efforts will yield results，If you 54 the inner world of your own，examine yourself and wipe out the dust and dirt，instead of fixing your eyes on other people，you will find a cheerful 55 for yourself and create a pleasant environment for others．

C．disappointed

C．certificate

A．suggestions

D．look through

多项选择题

期货公司首席风险官自被中国证监会及其派出机构认定为不适合人选之日起2年内，任何期货公司不得任用该人员担任（）。

A.副总经理

B.首席风险官

C.监事

D.董事长