單項選擇題建筑物上的防雷措施采用多根接地線時，應(yīng)在各接地線距地面（）處，設(shè)置斷接卡，斷接卡應(yīng)加保護措施。
A.1.4m～1.8m
B.1.5m～1.8m
C.1.6m～1.8m
D.1.7m～1.8m
A.1.4m～1.8m
B.1.5m～1.8m
C.1.6m～1.8m
D.1.7m～1.8m
