题目

下列反应的离子方程式书写不正确的是A．硫酸铜水解：Cu2++2H2OCu(OH)2+2H+B．澄清石灰水与少量小苏打溶液混合：Ca2++2OH－+2HCO3-＝CaCO3↓+ CO32-+2H2OC．氯化铝溶液加入过量的氨水：Al3+＋3NH3·H2O＝A1(OH)3↓＋3NH4+D．NaHSO4溶液中滴加NaHCO3溶液：H++ HCO3-＝H2O+CO2↑  答案：B解析:略 Even though it was only October，my students were already whispering about Christmas plans. With each passing day everyone became more_36__ waiting for the final school bell. Upon its__37__ everyone would run for their coats and go home，everyone except David.David was a small boy in ragged clothes. I had often__38__ what kind of home life David had，and what kind of mother could send her son to school dressed so__39__for the cold winter months without a coat，boots，or gloves. But something made David__40__.I can still remember he was always__41__a smile and willing to help. He always__42__ after school to straighten chairs and mop the floor. We never talked much. He__43__ just simply smile and ask what else he could do，then thank me for letting him stay and slowly__44__ home.Weeks passed and the__45__ over the coming Christmas grew into restlessness until the last day of__46__ before the holiday break. I smiled in__47__ as the last of them hurried out of the door. Turning around I saw David__48__ standing by my desk.“I have something for you，”he said and__49__ from behind his back a small box.__50__  it to me，he said anxiously，“Open it.” I took the box from him，thanked him and slowly unwrapped it. I lifted the lid and to my__51__ I saw nothing. I looked at David’s smiling face and back into the box and said，“The box is nice，David，but it’s__52__.”“Oh，no. It isn’t.” said David. “It’s full of love. My mum told me before she died that love was something you couldn’t see or touch unless you know it’s there.”Tears filled my eyes___53__I looked at the proud dirty face that I had rarely given__54__ to. After that Christmas，David and I became good friends and I never forgot the meaning__55__the little empty box set on my desk.【小题1】A．anxiousB．courageousC．seriousD．cautious【小题2】A．warningB．ringingC．callingD．yelling【小题3】A．scoldedB．wonderedC．realizedD．learned【小题4】A．modestlyB．naturallyC．inaccuratelyD．inappropriately【小题5】A．popularB．upsetC．specialD．funny【小题6】A．expressingB．deliveringC．wearingD．sharing【小题7】A．practisedB．wanderedC．studiedD．stayed【小题8】A．wouldB．shouldC．mightD．could【小题9】A．aim atB．turn toC．put offD．head for【小题10】A．argumentB．excitementC．movementD．judgment【小题11】A．schoolB．yearC．educationD．program【小题12】A．reliefB．returnC．vainD．control【小题13】A．weaklyB．sadlyC．quietlyD．helplessly【小题14】A．searchedB．foundC．raisedD．pulled【小题15】A．HoldingB．HandingC．SendingD．Leaving【小题16】A．delightB．expectationC．appreciationD．surprise【小题17】A．cheapB．emptyC．uselessD．improper【小题18】A．asB．untilC．becauseD．though【小题19】A．adviceB．supportC．attentionD．command【小题20】A．fromB．behindC．overD．towards