A.90m
B.100m
C.110m
D.120m

A.4.5m
B.3.5m
C.2.5m
D.1.5m

A.15~30m
B.30~45m
C.45~60m
D.60~75m

A.40m
B.50m
C.60m
D.80m

A.先开挖后支护
B.自上而下分层开挖，分层支护
C.不得掏底开挖
D.不得上下重叠开挖

A.150m；100m
B.110m；90m
C.100m；80m
D.90m；70m

A.150m
B.200m
C.250m
D.300m

A.高压在上、低压在下，干线在上、支线在下
B.高压在下、低压在上，干线在上、支线在下
C.高压在上、低压在下，干线在下、支线在上
D.高压在下、低压在上，干线在下、支线在上

A.5min
B.7min
C.lOmin
D.15min

A.地质法
B.超前钻孔声波测井法
C.超前水平钻孔法
D.波反射法

A.20m
B.30m
C.40m
D.50m