各矿山检测矿井及作业面的风速、风量和风质在安排人员作业时要求做到()
A、不定期检测B
暂无解析
写信(40points)
Writealetteraccordingtothefollowingsituation:theWenchuanearthquakehasmadethiswinterextremelydifficultforthevictims.WritetotellyourfriendSmiththatyouareraisingmoneytobuy200piecesofcotton-paddedclothingandsomeothernecessitiesfortheearthquakevictims.Askhimtojointhecharityandshowyourappreciationsforhishelp.Don’tforgettotellhimyourphonenumber555-5555forfurtherdiscussion.PleasesignyournameasLiPing.(150-200words)
下面所述小儿的总热量中哪项所需热量是小儿最特殊的（）
Newdriversarefarmore________tohaveaccidentsthanexperienceddrivers.
衡量小儿营养状况最重要的指标是（）
Thetwogirlscompetedwitheachother______thehighestmark.
