We are warned by our teachers not to was

题型:完形填空

问题:

We are warned by our teachers not to waste time because time 26 will never return. I think it quite 27. What does time look 28 ? Nobody knows, and we can’t see it or touch it and no 29 of money can buy it. Time is abstract(抽象的), so we have to  30 about it.
Time passes very quickly. Some students say they don’t have 31 time to review their lessons. It is 32 they don’t know how to make use of their time. They waste it in going to theatres or playing, and 33 other useless things. Why do we study everyday? Why do we work? Why do most people 34 take buses instead of walking? The answer is very 35 .We wish to save time because time is36.
Today we are living in the 21st century. We 37  time as life. When a person dies, his life ends. Since life is short, we must 38 our time and energy to our study so that we 39 be able to work and live well in the future. Laziness is the 40 of time, for it not only brings us 41 , but also does other 42 to us. If it is necessary for us to do our work today, 43 we do it today and not 44 it until tomorrow. Remember that time is much more 45.
小题1:
A.lostB.passedC.missedD.used
小题2:
A.importantB.trueC.interestingD.usual
小题3:
A.for B.likeC.afterD.over
小题4:
A.amountB.qualityC.quantity D.price
小题5:
A.think B.imagineC.examineD.check
小题6:
A.spare B.freeC.enoughD.much
小题7:
A.thatB.whyC.becauseD.certain
小题8:
A.doingB.makingC.takingD.getting
小题9:
A.needn’tB.have toC.had betterD.would rather
小题10:
A.easyB.simpleC.stupidD.interesting
小题11:
A.worthlessB.pricelessC.readyD.little
小题12:
A.look uponB.agree C.thinkD.believe
小题13:
A.spendB.giveC.setD.devote
小题14:
A.mustB.shouldC.mayD.would
小题15:
A.helperB.thiefC.friendD.teacher
小题16:
A.wealthB.healthC.failureD.illness
小题17:
A.danger B.harmC.troubleD.difficulty
小题18:
A.helpB.makeC.haveD.let
小题19:
A.keepB.remainC.manageD.leave
小题20:
A.valuableB.expensiveC.worthD.rich
考点:日常生活类阅读
题型:完形填空

A、B、C、D分别是HNO3、Ba(NO3)2、NH4Cl、NaOH四种溶液中的一种。欲将它们一一鉴别,甲、乙、丙分别提出如下方案,请回答有关问题:

(1)甲同学用物质X一次性鉴别上述四种物质,他将适量的X溶液分别加入到四种溶液中,结果发现:C溶液变为棕黄色;B溶液中有白色沉淀产生;D溶液中有能使湿润的红色石蕊试纸变蓝的气体产生,同时产生白色沉淀,最终变为红褐色。

B的化学式是________;D的电子式是________;X的化学式是________;A溶液中水的电离程度________(填“大于”、“小于”或“等于”)C溶液中水的电离程度。

(2)乙同学提出用明矾来鉴别上述四种物质,写出能检验出NH4Cl溶液所涉及的所有离子方程式:Ba2+SO42-=BaSO4↓、________________________。

(3)丙同学用MgSO4来鉴别上述四种溶液,在生成的白色沉淀Mg(OH)2中分别加入HNO3和NH4Cl溶液时,发现沉淀均溶解。有以下两种解释,同时提供下表数据:

A.NH4Cl溶液能使Mg(OH)2溶解,主要是NH4+水解产生H的缘故。

B.NH4Cl溶液能使Mg(OH)2溶解,主要是NH4+结合OH的缘故。

0.01 mol·L-1

电解质溶液

HFCH3COOHHCNNH3·H2O
酸中H或碱

中OH的浓度/mol·L-1

8.00×10-41.32×10-41.00×10-41.33×10-4
 

若要证明A和B哪一种解释正确,可以在生成的Mg(OH)2沉淀中加入一种物质,这种物质的化学式为__________________。

题型:完形填空

一个带电小球,用细绳悬在水平方向的匀强电场中,当小球静止后把悬线烧断,小球将做(   )

A.自由落体运动

B.匀变速曲线运动

C.沿悬线的延长线的匀加速直线运动

D.变加速直线运动

题型:完形填空

男性,50岁,喉结核不规则服异烟肼半年,2周前突发语言不清,右侧肢体肌力下降,胸片两肺弥漫性小结节影,上中部较多部分有融合,颅脑CT示脑栓塞。选哪项治疗方案

A.2HRSZ/4HR
B.4HRE/2HE
C.2HRE/4HR
D.顺铂+长春碱酰胺
E.顺铂+异环磷酰胺

题型:完形填空

假如你是中学生李华,你的美国朋友Jack在上次给你的电子邮件中抱怨自己最近眼睛近视了。请你给他用英语回一封电子邮件,内容如下:

1.介绍一下你们班同学近视的情况; 

2.分析一下造成你们班这种情况的原因;

3.帮Jack出点儿保持眼睛健康的主意。

注:1.字数110左右;邮件的开头和结尾已为你写好。

2.近视:shortsighted  adj.  shortsightedness n.

Dear Jack,

                                                                                   

                                                                                   

Yours sincerely        

Li Hua

题型:完形填空

现场5S管理包含:()、()、()、()、()。

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