A.
B.
C.
D.
参考答案:D
解析:
()from the top of the tower, the south foot of the mountain is a sea of trees.
A. Seen
B. Seeing
C. Having seen
D. To see
工作地段如有邻近、平行、交叉跨越及同杆塔架设线路,为防止停电检修线路上()电压伤人,在需要接触或接近导线工作时,应使用个人()线。