小明和小强是住同一幢楼的好朋友,小强住三楼,小明住六楼,小强每天回家走18级楼梯,则小明每天回家走______级楼梯.
由题意得:182×5=45级,
则小明每天回家走45级楼梯.
He tried his best to save the _____ boy, but the boy was _____ finally. [ ]
A. drown; drowning
B. drowning; drown
C. drowned; drowning
D. drowning; drowned
钢筋预埋件一般由()组成
A、锚板
B、直锚筋
C、弯折锚筋