如有可能，可建立一种功率自动控制系统，利用移动台接收到的基地台()对移动台发射功率进行自动控制，使移动台驶近基地台时降低发射功率。
A、信号的强度A
暂无解析
重写句子：Fossilfuelsarenon-renewable.Weneedtofindalternativeenergysources.(compoundsentence)
Ifanearthquakeoccurred，someoftheone-storeyhouses________.
Hisarticleisbetterthan_____intheclass.
写信(40points)
Writealetteraccordingtothefollowingsituation:theWenchuanearthquakehasmadethiswinterextremelydifficultforthevictims.WritetotellyourfriendSmiththatyouareraisingmoneytobuy200piecesofcotton-paddedclothingandsomeothernecessitiesfortheearthquakevictims.Askhimtojointhecharityandshowyourappreciationsforhishelp.Don’tforgettotellhimyourphonenumber555-5555forfurtherdiscussion.PleasesignyournameasLiPing.(150-200words)
Thehostsapologizedfor______thatsomeoftheirguestsmightbevegetarians.
