A.平行時(shí)為2m,交叉時(shí)為0.5m B.平行時(shí)為1m,交叉時(shí)為0.5m C.平行時(shí)為2m,交叉時(shí)為1m D.平行時(shí)為1m,交叉時(shí)為1m
A.0.3m B.0.5m C.0.7m D.1m