电缆线路在直埋敷设时其深度不应小于（）。
A.2m
B.1.6m
C.0.8m
D.0.7m
参考答案：C
排气压力增高是什么原因？
The speaker believes that a practical solution to the problem of starvation is to remove obstacles to adequate supply of food rather than to increase production of it.
A．True
B．False
