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【阅读理解Everyobjecthasweight.ButthecenterofitsweightisnotalwaysinthemiddleoftheobjectIfthetopofanobjectisheavierthanitsbottomitwillfallovereasily.Wesaythatitscenterofgravity(】
更新时间:2024-04-26 14:50:07
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阅读理解

Everyobjecthasweight.ButthecenterofitsweightisnotalwaysinthemiddleoftheobjectIfthetopofanobjectisheavierthanitsbottomitwillfallovereasily.Wesaythatitscenterofgravity(引力)ishigh.Butifthebottomisheavieritwon'tfalleasily.Thenwesaythatitscenterofgravityislow.

Lookatthefirstpictureliftsemptyboxmustfalloverbemuseitscenterofgravity(C)isnotabovethelineofitsbottom(AB).

Nowlookatthesecondpicture.Thereissomeheavyironatthebottomofthisbox.Itwillnotfallbecauseitscenterofgravityisaboveitsbottom.

(1)Pleasepointoutwhichboxwillnotfall?

(2)FromthepassagewecaninferthattheLeaningTowerofPisadoesnotfallisbecause_______.

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A.thetopofthetowerisheavierthanitsbottom

B.thebottomofthetowerisnotheavierthanitstop

C.itscenterofthegravityisstillabovethelineofitsbottom

D.itscenterofthegravityisnotabovethelineofitsbottom

(3)Ifanobjecthasalowcenterofgravity_______.

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A.itwon'tfall

B.itwon'tfalleasily

C.itiscertaintofallover

D.itstopmustbeheavier

(4)WhichofthefollowingisTRUEaccordingtothepassage?

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A.Thecenteroftheweightisalwaysinthemiddleoftheobject

B.Thecenteroftheweightisalwaysontheobject

C.Thecenterofgravityisnotalwaysinthemiddleoftheobject

D.Thecenterofthegravityisalwayshigh

(5)Thepassageismainlyabout_______.

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金晓回答:
  答案:C;C;B;C;A解析:(1)根据文中图2及第三段提示可以看出图c与文中的图2为同一类型。(2)比萨斜塔不倒说明它的重心在直线AB上。(3)根据第一段最后两句可知正确答案。(4)根据短文此题选C,意...
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