______, your composition is full of mistakes. A.Writing carelessly B.Written carelessly C.Having written carelessly D.Being written carelessly 答案:Bwrite所表示的动作与其逻辑主语有被动关系。Being written为现在分词进行时的被动,表示该动作正在进行,与题意不符,所以选B。如图所示的电路中,当电路闭合后,V1和V2的示数分别如图所示,则V1表示数为______V,V2表示数为______V,小灯泡L1两端的电压U1=______.