问题 选择题

现用18O作为示踪原子进行如下反应:2SO2(g)+18O2(g) 2 SO3(g),则当反应达到平衡后

18O原子存在于哪种物质中 [ ]

A.O2

B.SO3 、O2

C.SO3

D.SO2 、O2 、SO3

答案

答案:D

多项选择题
完形填空
After the quake hit northeast Japan on March 11, many moving stories that I saw with my own eyes happened around me.
I had to walk home since all the  41  had stopped after the earthquake. On my way home I  42  an old lady at a bakery shop who was giving out free bread, which made my heart  43 . A man was holding a sign that said, “Please use our  44 .” He was  45  his house for people to go to the restroom.
My friend wanted to  46  others. He stood in the cold with a sign “If you’re okay with a motorcycle, I will  47  you to your house.” And then I saw him take one gentleman home, all the way to a faraway place! 
Then next day I drove to  48  my car with gas. There is a lack (缺乏) of  49  now and many gas stations are either closed or have very  50  lines. I got  51 , since I was behind 15 cars. Finally, when it was my  52 , the man smiled and said, “ 53  this situation, we are only giving $30 worth gas per person. Is that alright?” “ 54 . I’m just glad that we are all able to  55 ,” I said. His smile gave me so much comfort.
I saw a man at the evacuation (疏散) center  56 when people brought food to him. It was the first time in three days that food was brought to their center. However, after he wiped the tears, his next  57  surprised me. “I am very  58  that we are provided with food. But people in the city next to us haven’t  59  any food at all. Please go to that center as well.” And when hearing that, I realized there is a bright future on the other side of this  60 .
小题1:
A.rescueB.lifeC.trafficD.business
小题2:
A.missedB.caughtC.noticedD.heard
小题3:
A.kindB.softC.brokenD.warm
小题4:
A.toiletB.hotelC.hospital D.house
小题5:
A.sellingB.openingC.repairingD.building
小题6:
A.encourageB.changeC.saveD.help
小题7:
A.driveB.followC.lead D.send
小题8:
A.startB.fill C.checkD.wash
小题9:
A.informationB.gasC.foodD.salt
小题10:
A.directB.fine C.long D.thin
小题11:
A.worriedB.lucky C.sadD.angry
小题12:
A.timeB.turn C.dutyD.decision
小题13:
A.Except forB.Together withC.Because ofD.Instead of
小题14:
A.Not at allB.Of courseC.No wayD.Never mind
小题15:
A.shareB.offer C.learnD.choose
小题16:
A.singingB.eatingC.smiling D.crying
小题17:
A.wordsB.rolesC.waysD.promises
小题18:
A.sureB.gratefulC.surprisedD.proud
小题19:
A.boughtB.wastedC.preparedD.received
小题20:
A.disasterB.chanceC.centerD.city