MIKE是一位中学生

LinTaoisamiddlestudentwholikesmusicverymuch.Becauseofhishobby,healwayslistentomusicwhenhedoeshishome

C1000MG=1G1000G=1KG所以4.2*10的7次方mg=42kg

答案B啊50千克A500千克C5千克D500千克

MYBUSYSUNDYLastsundyIhadaquickbreakfastandwenttoanorphanage.YoumayaskmewhyIwenttothere,becauseIamavo

手打如下：MynameisLinTao.Recentlyourschoolhashelddifferentkindsofactivities.Look!Therearemanystudentsplay

Mikewhoismyfriendisaddictedtocomputergames,ithasgreateffectsonhisstudy,Iwillhelphim.lwilltellhimplay

G=mg.(重力=质量*重力常数）g=9.8N/Kg(表示质量为1千克的物体受到的重力为9.8牛）计算时通常将g看成10n/kg所以50n约等于5kg故答案为c

Hello.MynameisLihong,Iamamiddleschoolstudent.Myfavouritesubjectishistory.becausehistoryisveryinteres

IamamemberoftheBirdwatchingClub.IwenttoDafengNatureReservetowatchred-crownedcranes.Itisanidealhomefo

490牛已知：m=50千克,g=9.8牛/千克求G=?解：G=mg=50千克X9.8牛/千克=490牛

5×104克=50千克B

MyGrandfatherMygrandfatherisanshortandskinnymanwithaskinnyandlongface.Hehassmalleyes,bignose,andheal

MygoodfriendWangkaiisamiddleschoolstudent.Hegetsupveryearlyeveryday,thendoesmorningexercise.Heisstro

Mikeisoneofourgoodfriends.

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TodayisChildren'sday.Me---avolunteerisgoingtocelebratethisfestivalwiththechildrenwhodidn'thavetheirp

DearMike,Thanksforyourletter.Iamsorrytohearthatyouareintroublenow.Youareaddictedtocomputergamesandha

DearLucy,　　Whatyousaidiscommonwithsomemiddleschoolstudents.Hereismyadvice.　　First,youshouldlearnhowt

Thanksforyourletter.15岁父母不让骑自行车上学?老外咋想的...