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Webuildthemetricsystemontens.Itislikeourmoneysystem.Adollarisone-hundredcents.Ameter,inthesameway,isonehundredcentimeters.Akilometerisonethousandmeters.Centimetersarelikeinches.Theymeasuresmallthing
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问题描述:

Webuildthemetricsystemontens.Itislikeourmoneysystem.Adollarisone-hundredcents.Ameter,inthesameway,isonehundredcentimeters.Akilometerisonethousandmeters.

Centimetersarelikeinches.Theymeasuresmallthings.Ittakesabouttwoandahalfcentimeterstomakeaninch.

Kilometersarelikemiles.Theyareusedtomeasurelongdistances.Akilometerisalittlemorethanhalfamile.

Itiseasytousemetricmeasuresbecausetheyareintens,hundreds,orthousands.Whenyouuseinches,youhavetoknowmanydifferentunits.Youhavetoknowthattwelveinchesareafoot.Threefeet,orthirty-sixinches,makeayard.Amileisfivethousandtwohundredandeightyfeetoronethousandsevenhundredandeightyyards.

Butwithmeters,tencentimetersmakeadecimeter.Tendecimetersmakeameter.Athousandmetersmakeakilometer.

Fromthestoryyoucantellthat________.

A

centimetersarelongerthanfeet

B

inchesandfeetarenolongerused

C

kilometersperhourtellshowfastyouaregoing

D

twelvefeetareayard

Thestoryasawholeisabout________.

A

dollarsandmeters

B

thesystemoftens

C

measuringdistances

D

centimetersandinches

Isayardthirty-sixinches?

A

Yes.

B

No.

C

Doesnotsay.

D

Maybe.

Isaninchlongerthanacentimeter?

A

Yes.

B

No.

C

Doesnotsay.

D

Maybe.

杜金玉回答:
  【分析】1.由文章可知,2.5厘米=1英寸,而12英寸=1英尺,因此第一项不正确;长度单位英寸和英尺仍在使用,第二项不正确;第四段Threefeet...makeayard知,第四项也不正确;只有第三项表述正确。   2.文章主要讲述了长度单位的十进制。   3.文章第四段第四句讲到,36英寸是1码。   4.由第二段最后一句知1英寸=2.5厘米。
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