题目

小川同学用实验探究铁、镁、铜三种金属的活动性顺序时，将有关反应记录如下： Fe+2HCl=FeCl2+H2↑      Mg+2HCl=MgCl2+H2↑   Fe+CuSO4=FeSO4+Cu      Cu+2HCl→不反应 （1）从上述反应中，可获得的信息有（至少两条） ， ； （2）通过观察实验现象，能说明镁比铁活泼的依据是 ；如果补充一个实验（用化学方程式） ，也能说明镁比铁活泼． （3）用金属活动顺序解释生活中的一些现象，如：（4）使用铁锅有利于人体健康，主要原因是（5）人们大量使用的：完形填空 （共20小题；每小题1分，满分20分）请认真阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。Soon Tommy’s parents, who had recently separated (分居), would arrive for a meeting on his failing schoolwork and  【小题1】  behavior. Neither parent knew that I had called up   【小题2】 . Tommy, an only child, had   【小题3】 been happy, cooperative, and an excellent student. How could I make his father and mother  【小题4】  that his recent failing grades   【小题5】  a brokenhearted child’s reaction to his respected parents’ separation and possible   【小题6】 ?Tommy’s mother came in and   【小题7】 one of the chairs I had placed near my desk. Then the father   【小题8】  and was surprised to see his wife. They pointedly ignored each other.As I gave a detailed   【小题9】 of Tommy’s behavior and schoolwork, I prayed for the   【小题10】  words to bring these two together to help them see what they were doing to their son.   【小题11】  somehow the words wouldn’t come.I found a crumpled (弄皱的), tear-stained  【小题12】  in the back of Tommy’s desk. Writing covered both sides, a single  【小题13】  scribbled (乱写) over and over.Silently I smoothed it out and gave it to Tommy’s mother. She read it and then without a word   【小题14】 it to her husband. He frowned. Then his face softened. He studied the scribbled words for  【小题15】  seemed a future life.At last he folded the paper carefully and   【小题16】 his wife’s hand. She wiped the tears from her  【小题17】 and smiled up at him. I also couldn’t keep back tears, but  【小题18】 seemed to notice.In this way I used the words to  【小题19】  that family. On the sheet of yellow copy paper   【小题20】  with the painful outpouring of a small boy’s troubled heart, it said, “Dear Mother; Dear Daddy; I love you. I love you. I love you.”【小题21】A．satisfyingB．excitingC．disappointingD．surprising【小题22】A．the othersB．the otherC．another oneD．each other【小题23】A．neverB．rarelyC．alwaysD．usually【小题24】A．hopeB．believeC．promiseD．trust【小题25】A．stood forB．looked forC．cared forD．made for【小题26】A．happinessB．crueltyC．selfishnessD．divorce【小题27】A．gotB．tookC．satD．seated【小题28】A．reachedB．satC．arrivedD．went【小题29】A．accountB．recordC．writingD．paper【小题30】A．commonB．excitingC．mistakenD．right【小题31】A．So B．AndC．ButD．Then【小题32】A．letterB．sheetC．messageD．schoolwork【小题33】A．wordB．articleC．phraseD．sentence【小题34】A．threwB．took C．handedD．picked【小题35】A．whichB．as ifC．whatD．when【小题36】A．reached forB．hunted forC．kept offD．searched for【小题37】A．facesB．eyesC．headD．nose【小题38】A．bothB．neitherC．eitherD．none【小题39】A．reuniteB．uniteC．satisfyD．keep【小题40】A．linedB．coloredC．writtenD．covered