题型：名词解释 现有H、O、H+、O2-、H2、O2、OH-、H2O八种粒子，试用这些粒子的符号填空．（1）能保持水的化学性质的粒子是______；（2）氢气和氧气化合生成水的过程中的最小粒子是______；（3）水变成水蒸气是______没有变化；（4）电解水得到的产物是______；（5）没有电子的粒子是______；（6）质子数少于核外电子数的粒子是______． 查看答案
题型：名词解释 读图，回答问题。（1）图上各点中，正值白天的是___________，正值黑夜的是___________。（2）朝向太阳的半球上，______点将首先进入黑夜；背向太阳的半球上，______点白昼即将来临。（3）该图表示的______月______日的太阳照射情况，这一天北半球大部分地区正午太阳高度________，白昼时间______。这时，北半球是______季，南半球是______季。 查看答案
题型：名词解释 完形填空. Several years ago,while attending a communications course,I experienced a most unusual process.The instructor asked us to list__1__in our past that we felt ashamed of.The next week he invited participants to read their lists aloud.Then he suggested that we__2__ways to apologize to people,or take some action to__3__any wrongdoing. The next week,the man next to me raised his hand and__4__the following story: While making my list,I remembered an__5__from high school.I grew up in a small town in Iowa.There was a sheriff (治安官)in town that__6__of us kids liked.One night,my two followers and I decided to__7__Sheriff Brown.We found a can of red paint,climbed the tall water tank in the middle of town,and wrote,on the tank,__8__bright red letters: Sheriff Brown is a beast.The next day the town arose to see our glorious sign. Within two hours,Sheriff Brown__9__my two friends and me in his office.My friends admitted and I__10__,denying the truth. Nearly 20yearslaterSheriffBrown'sname appears on my list.I didn't even know if he was still__11__.Last weekend,I dialed information in my hometown back in Iowa.__12__,there was a Roger Brown still__13__.I dialed his number.After a few rings,I heard," Hello?" I said,"Sheriff Brown?"Pause."Yes.""Well,this is Jimmy Calkins.And I want you to know that I__14__it.""I knew it!"he yelled back.We had a good__15__and a lively discussion.His closing words were,"Jimmy,I always felt badly for you because your__16__got it off their chest,and I knew you were__17__it around all these years.I want to thank you for calling me...for your__18__." Jimmy's story inspired me to__19__all the items on my list.No matter how difficult the situation is,I always remember that it's never__20__to clear up the past and begin resolution.( )1.A.what( )2．A.make( )3．A.right( )4.A.interviewed ( )5．A.accident ( )6．A.none( )7．A.have a joke with ( )8．A.for( )9．A.had( )10．A.discussed( )11．A.active ( )12．A.Enough sure( )13．A.checked( )14．A.did( )15．A.party( )16．A.family ( )17．A.carrying ( )18．A.advantage( )19．A.take up( )20．A.too earlyB．anythingB．get B．supportB．saidB．incident B．neither B．play a role in B．byB．asked B．spokeB．aliveB．Unexpected enough B．listed B．said B．meeting B．followers B．fetchingB．profitB．bring up B．too lateC．someone C．consult C．findC．volunteered C．event C．bothC．pay a visit toC．inC．tookC．saidC．deadC．Sure enough C．testedC．tookC．laugh C．relatives C．catchingC．interestC．clear upC．early enoughD．somethingD．find D．doD．made D．affairD．all D．play a trick onD．with D．caughtD．liedD．alikeD．Enough strange D．witnessed D．hadD．get－togetherD．parentsD．movingD．sake D．break up D．late enough 查看答案
题型：名词解释 张三的单位盖了新房。张三预计自己可以分到一套三居室，于是先按房屋面积购买了一些纯毛地毯，准备搬入新居时使用，但张三没有分到房屋。张三购买地毯的行为是( ) A．有效行为。该行为的效力与单位分房之间没有内在联系 B．可撤销行为。因为张三对于购买地毯的目的存在重大误解 C．有效行为。因为该行为虽有误解但不重大 D．无效行为。因为张三购买地毯的动机没有实现，其意思表示是不真实的 查看答案
sheriff (治安官)in town that__6__of us kids liked.One 
ll__11__.Last weekend,I dialed information in my hometown back in Iowa.__12__,