问题 选择题

.用NA表示阿伏加德罗常数,下列叙述正确的是

A.1 mol Cl2参加反应转移电子数一定为2 NA

B.常温常压下,含有6.02×1024个电子的重水(D2O)的质量约为18 g

C.常温常压下,NA个CO2分子占有的体积大于22.4L

D.0.5 mol·L-1 Na2SO4溶液中所含Na+的数目为NA

答案

答案:C

A.1 mol Cl2参加反应转移电子数不一定为2 NA,1 mol Cl2与水,与氢氧化钠反应转移电子总数  NA

B.常温常压下,含有6.02×1024个电子的重水(D2O)的质量约为20 g

D.1L0.5 mol·L-1 Na2SO4溶液中所含Na+的数目为NA

完形填空
My friend Jenny from Germany spent some time traveling in India. She   36  the country so much that she always got attracted to it. While there, she stayed with Leela, her friend who was Indian.   37  the gazes that she got as a foreigner, Jenny always had language problems. It was very difficult for her to   38  in this new environment and culture that had so many subtle (细微的)  39  from her own country.
One day, a   40  thing happened. Along with Leela, she went to visit an orphanage. All the children there were tiny; each one fell   41  between the ages of fifteen days to one-and-a-half years old.
After some initial(最初的)   42 , Jenny slowly went to the kids and sat beside them. After some time, one of the kids smiled at her. She felt   43  a little, and she was immediately   44  towards that child.
She slowly held the child and started singing a rhyme in   45 . The small child continued to smile and started   46  after her. The words that escaped the little mouth were much different from those that Jenny hummed, but the   47  was the same.      
Wanting to join in the   48 , another kid went up to Jenny and started humming the rhyme. They shared a million   49  together.
  50  Leela's eyes on her, she blurted( 脱口而出) an explanation straight from her heart: “See, I don't have                 
  51  problems here. We speak; we communicate!”
And she continued with her rhyme   52  she didn’t want to disturb the child’s smile.
That day, it was   53  for Leela and the others in the orphanage to see such a heartwarming scene. In that moment, she understood: we're all simply human, and we have the ability to   54 with each other; it's   55 , and comes from deep inside.
小题1:
A.lovedB.dislikedC.understand D.missed
小题2:
A.Rather thanB.More thanC.Apart fromD.Instead of
小题3:
A.contributeB.improveC.communicateD.entertain
小题4:
A.similaritiesB.distancesC.opportunitiesD.differences
小题5:
A.terribleB.strange C.normalD.risky
小题6:
A.anywayB.somewhatC.somewhereD.anyhow
小题7:
A.doubtB.hesitationC.acknowledgmentD.observation
小题8:
A.stressedB.annoyedC.relaxedD.scary
小题9:
A.persuadedB.expected C.askedD.drawn
小题10:
A.GermanB.EnglishC.IndiaD.French
小题11:
A.runningB.playingC.repeatingD.laughing
小题12:
A.musicB.tuneC.pronunciationD.voice
小题13:
A.performanceB.raceC.funD.story
小题14:
A.experiencesB.sorrowsC.songsD.smiles
小题15:
A.NoticingB.IgnoringC.ExaminingD.Avoiding
小题16:
A.healthB.thoughtC.economyD.language
小题17:
A.in caseB.even thoughC.as ifD.so that
小题18:
A.embarrassingB.amazingC.disappointingD.puzzling
小题19:
A.connectB.meetC.agreeD.compare
小题20:
A.toughB.meaninglessC.difficultD.simple
单项选择题