A:one of it; where
B:one of which; where
C:one of that; which
D:one of which; which
下列各句中,没有语病的一句是( )
如图所示,高空滑索是一项勇敢者的运动,某人用轻绳通过轻质滑环悬吊在倾角为30°的钢索上运动,在下滑过程中轻绳始终保持竖直,不计空气阻力,则下列说法中正确的是()