大学英语1
21.
Snowflakeslooklikewhitestarsfallingfromthesky.Buttherehavebeentimeswhensnowhaslookedred,green,yellow,orblack.Therehavebeensnowflakesofalmosteverycolor.Thinkhowitwouldseemtohavecoloredsnowflakescomingdownallaroundyou.
BlacksnowfellinFranceoneyear.AnotheryeargreysnowfellinJapan.Itwasfoundthatthesnowwasmixedwithashes.Thismadeitlookdark.Redsnowhadcomedowninothercountries.Whenthishappened,thesnowwasmixedwithreddust.
Mostsnowlookswhite,butitisreallythecolorofice.Snowisicethatcomesfromsnowcloud.Eachsnowflakebeginswithasmalldropoffrozenwater.Morewaterformsaroundthisdrop.Thewaythewaterfreezesgivesthesnowflakesitsshape.
Notwosnowflakesareeverjustthesamesizeorshape.Sometimesthesnowflakesarebrokenwhentheycomedown.Othersnowflakesmeltastheyfall.Allsnowflakesareflatandhavesixsides,iftheyarenotbrokenormelted.Whentheairiscoldanddry,thefallingsnowflakesaresmallandhard.Iftheairwetandwarm,thesnowflakesarebigandsoft.
Wouldyoubesurprisedtoseesnowflakesasbigasyourheadfallingfromthesky?IthappenedonceintheUnitedStates.Itcouldhappenagain.
Thefirsttwoparagraphsmainlytellusthatsometimessnowhasdifferentcolors.
单选题
A.A.T
B.B.F
Notwosnowflakesarejustthesamesize,butallsnowflakesarehard.
单选题
A.A.T
B.B.F
Snowflakesbeginwithcloud.
单选题
A.A.T
B.B.F
Thebiggerthesnowflakesare,thesoftertheyare.
单选题
A.A.T
B.B.F
BlacksnowfellonlyinEuropeanCountries.
单选题
A.A.T
B.B.F
