“双语”教学工作的总体目标是什么？

A. 地下室
B. 门厅
C. 穿过建筑物的通道
D. 电梯井

A. 靴子
B. 软底鞋
C. 绝缘鞋
D. 拖鞋

A. 正确
B. 错误

A. By serving
By splicing one end of the line around the apparatus
C. Securely attached around the outside in bights no longer than three feet
D. With an approved safety hook or shackle