问题 计算题

( 6分)标准状况下,0.1mol某烃完全燃烧燃烧后,产生17.92升二氧化碳气体和9克水。该烃不能与溴水反应,但可使酸性高锰酸钾溶液褪色,则:

(1)此烃的分子式为                          

(2)该烃硝化时,一硝基取代物仅一种,则该烃的结构简式为           

(3)该烃硝化时,一硝基取代物有3种,则该烃的结构简式为          。 

答案

(1)C8H10    (2)    (3)

单项选择题
完形填空
The trip to that city was eye-opening for everyone, and near its end, all the young people in our group began to reflect on what it had meant. We   41  the first night we had arrived. We had all gone into the markets of the city   42  the young people could experience its energy. But what we actually saw simply   43  us all --- the rundown houses, the children in rags, the people begging for money… Walking home,   44  under a low bridge, we came across   45  families of homeless people seeking a bit of dry ground to sleep on   46  the night. We had to step over bodies as we found our way through the darkness.
The poverty was   47  than anything my young companions had ever imagined. Back in the hotel, an air of sadness settled over the group. Many   48  and cried. Spending time in this   49  moves a person to care about humanity.
That evening, our group spent hours talking about what we had   50  Gently, I encouraged everyone to talk about the difficult   51  that day’s discoveries had inspired. Sitting together   52  a circle as everyone had a chance to speak, we all began to realize that  53  of us was alone in our struggle to cope with our reactions.
Based on my   54  in poverty-stricken areas, I suggested that   55  the emotions we had were painful, they could also be important in helping us to move forward. We all   56  that we had seen things that should never be allowed to happen.   57  , what could we do about it? Together, we began to brainstorm ways we could help to ease the   58  we had seen. As I encouraged group members to focus on   59  they could do, a sense of determination  60  the previous sadness. Instead of despair, these young people began to feel a call to action.
小题1:
A.put up withB.got back toC.looked back onD.made up for
小题2:
A.now thatB.so thatC.as ifD.even if
小题3:
A.puzzledB.annoyedC.embarrassedD.shocked
小题4:
A.marchingB.runningC.passingD.moving
小题5:
A.entireB.normalC.averageD.general
小题6:
A.beyondB.withC.tillD.for
小题7:
A.strongerB.deeperC.worseD.less
小题8:
A.gave upB.broke downC.set offD.held on
小题9:
A.environmentB.hotelC.houseD.background
小题10:
A.inspectedB.attemptedC.witnessedD.challenged
小题11:
A.feelingsB.decisionsC.thoughtsD.impressions
小题12:
A.alongB.aroundC.byD.in
小题13:
A.neitherB.eitherC.noneD.each
小题14:
A.experiencesB.schedulesC.dataD.position
小题15:
A.onceB.whileC.sinceD.unless
小题16:
A.supposedB.advisedC.confirmedD.agreed
小题17:
A.SurelyB.RatherC.NowD.Indeed
小题18:
A.burdenB.sufferingC.anxietyD.difficulty
小题19:
A.howB.whereC.whatD.when
小题20:
A.replacedB.changedC.coveredD.improved