2021中考英語閱讀理解：The Speed of Light

原創(chuàng)整理僅供參考2021中考英語閱讀理解：TheSpeedofLight做中考英語閱讀理解題時(shí)應(yīng)注意的問題：忌不帶問題。做閱讀理解題時(shí)，應(yīng)先把文章后面所給的考查題瀏覽一遍，然后帶著這些問題進(jìn)行閱讀。邊閱讀邊選出考查表層情況問題的答案，從而提高閱讀效果。更多有關(guān)2021中考英語的信息可登錄出國留學(xué)網(wǎng)英語頻道，歡迎收藏本站(CTRL+D即可收藏)!

TheSpeedofLight

Lighttravelsataspeedwhichisaboutamilliontimesfasterthanthespeedofsound.

Inonesecond,lighttravelsabout300,000kilometres.

Butsoundtravelsonly0.344kilometres.Youcangetsomeideaofthisdifferencebywatchingthestartofarace.IfyouStandsomedistance(距離)awayfromthestarter,youcanseesmokecomefromhisgun

(槍)beforethesoundreachesyourears.

Thisgreatspeedoflightproducessomestrangefacts.Sunlighttakesabout8minutesto

reachus.Ifyoulookatthelightofthemoontonight,rememberthatthelightleftthemoon

1.3secondbeforetheyreachedyou.Theneareststarisfarawayfromtheearth.Thelight

whichyoucanseefromittonightstartedtotraveltowardsyoufouryearsagoataspeedof

nearly2millionkilometersoneminute.Insomecases(情況)thelightfromoneof

tonight?sstartsstartedonitsjourneytoyoubeforeyouwereborn.

Ifwewanttobehonest(誠實(shí)),wecannotsay"Thestarsareshiningtonight.'Wehave

tosay,"Thestarslookpretty(漂亮).Theywereshiningfouryearsago.Buttheirlight

hasonlyjustreachedtheearth..'

判斷正誤：

()1.Lightspeedisaboutamilliontimesfasterthansoundspeed.

()2.Ifyoustand100metresawayfromastarter,youcanhearthegunbeforeyousee

thesmoke.

()3.Themoonmustbeabouttwomillionkilometersawayfromtheearth.

()4.Thesunmustbeabout480times300,000kilometresawayfromtheearth..

()5.Themoonlightweseetonightstartedtotraveltowardsusfouryearsago.

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