A.不高于0.6m;不低于1.9mB.不低于0.8m;不高于1.7mC.不高于0.8m;不低于1.7mD.不低于0.6m;不高于1.9m
A.0.7-1.7米;0.3-2.5米B.0.3-1.7米;0.7-2.3米C.0.7-1.9米;0.4-2.5米D.0.5-1.8米;0.2-2.1米