A:What's your name?
B:What's the boy's name?
C:What is her name?
据该图信息推知甲河流域此时( )
I play football badly ____(and/but)I play basketball well.
如图所示,用定滑轮和动滑轮分别将质量相同的甲、乙两物体匀速提升相同的高度,不计绳重与摩擦,且动滑轮重小于物重,使用甲图滑轮最大的优点是____ ;所用的拉力F甲____ F乙(选填“>”、“<”或“=”)。