更多"[多选题]Ⅲ型防山洪电杆基础和Ⅳ型防山洪电杆基础,选用的条件为()"的相关试题:
[多选题]Ⅰ型防山洪电杆基础和Ⅱ型防山洪电杆基础,选用的条件为()
A.200≤坡度(i)<300,
B.山洪冲刷区域日最大降雨量<50mm
C.300≤坡度(i)<500,
D.山洪冲刷区域50mm≤日最大降雨量<250mm
[单选题]Ⅳ型防山洪电杆基础,选用的条件为()
A.200≤坡度(i)<300,山洪冲刷区域日最大降雨量<50mm
B.300≤坡度(i)<500,山洪冲刷区域日最大降雨量<50mm
C.200≤坡度(i)<300,山洪冲刷区域50mm≤日最大降雨量<250mm
D.300≤坡度(i)<500,山洪冲刷区域50mm≤日最大降雨量<250mm