问题
单项选择题
在车辆，农业机械不能到达的山坡、峭壁和岩石处，加强线最大弛度时距地面的高度不得小于（）。
A.4m
B.5m
C.6m
D.7m
答案
参考答案：B
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在车辆，农业机械不能到达的山坡、峭壁和岩石处，加强线最大弛度时距地面的高度不得小于（）。
A.4m
B.5m
C.6m
D.7m
参考答案：B
| 方框填词 | |
Man has been polluting the earth. The more people, the 4 pollution. Many years ago, the problem was not so 5 before because there were not so many people. When the land was used up or the river was dirty in a place, men moved to 6 place. But this is no longer possible. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us talk 7 and become angry 8 . Air pollution is still the most serious. It's bad to all living things in the world. The pollution SO2 is now 9 problem of air pollution. It is caused by heavy traffic. It is sure that if there are 10 people driving, there will be less air pollution. |