问题 填空题

(2011年江西,16题)请用恰当的化学用语表示下列加点部分:

(1)空气中含量最多的气体是氮气       ;(2)加碘食盐中的“碘”是指碘元素     

(3)铯(Cs)原子结构示意图为,铯原子在化学反应中容易形成铯离子      

答案

(1)N2 (2)I (3)Cs+

:(1)空气中含量最多的气体是氮气,氮气分子为双原子构成的分子,其化学式为N2

(2)加碘食盐中“碘”是指碘元素,其化学符号为I;

(3)根据铯(Cs)原子的结构示意图为可知,此原子最外层电子数为1,铯原子在化学反应中容易失去1个电子而带1个正电荷,故离子符号为Cs+

故答为:(1)N2;(2)I;(3)Cs+

单项选择题 A1型题
完形填空
When you’re a preteen, a huge problem might be that you just have to have a new rock-rap CD,   1 your parents won’t give you the money for it. I thought life was so  2 when things like this happened-----until September 11, 2001.
I was in P.E. when the planes hit the World Trade Centre and the Pentagon. As soon as I got home and for weeks before, I saw the disaster  3 on TV. Seeing the innocent people running for theiras the debris(瓦砾) started coming down the fire and smoke rose out of the  5 brought tears to my eyes. I couldn’t help imagining what the people on the   6 and in the buildings were thinking and going through, not  7 what was going on. I admired the courage of the firefighters who rushed in and risked their own lives to   8 others. It tore my heart apart to watch the  9 looks on the faces of so many people who didn’t know if their loved ones were dead or alive while  10 in all the debris.
Then it  11 me: All my life I had thought mainly of myself. I had it easy in life and had been taking it all for granted.
A feeling of coldness  12 down my back, and I cried just thinking of the possibility that it could have easily  13 to my family. My mom or dad could have been killed like that, and I would never, ever see them again. I began to evaluate what a real  14 in life was.
This disaster  15 me that awful things can happen to anyone at any time. Now when my mom or dad or sister go somewhere, even if it’s just  16 the store, I try to remember to tell them that I love them because I know there is a   17 that I may never tell them that   18 .
Not getting a new CD is not going to   19 my life. I can live with those kinds of problems. But losing someone I love would  20 make my life miserable.
9/11 showed me just what I am.          
小题1:
A.orB.soC.butD.for
小题2:
A.unfairB.uncomfortableC.unbelievableD.uncertain
小题3:
A.happenB.occurC.strikeD.unfold
小题4:
A.livesB.familiesC.housesD.friends
小题5:
A.curtainsB.buildingsC.gatesD.bedrooms
小题6:
A.seatsB.planesC.cornersD.streets
小题7:
A.believingB.thinkingC.caringD.knowing
小题8:
A.joinB.saveC.meetD.calm
小题9:
A.puzzledB.severeC.dirtyD.desperate
小题10:
A.hiddenB.foundC.trappedD.placed
小题11:
A.hitB.surprisedC.rewardedD.told
小题12:
A.cooledB.droppedC.ranD.passed
小题13:
A.happenedB.comparedC.relatedD.turned
小题14:
A.relationshipB.problemC.needD.fate
小题15:
A.persuadedB.remindedC.taughtD.informed
小题16:
A.toB.inC.atD.on
小题17:
A.storyB.doubtC.chanceD.plan
小题18:
A.everB.onceC.enoughD.again
小题19:
A.endB.save C.spareD.break
小题20:
A.ratherB.trulyC.probablyD.frequently