A.5m
B.10m
C.15m
D.20m
A.2~4%
B.4~6%
C.6~8%
D.8~10%
开始考试点击查看答案A.1个
B.2个
C.3个
D.4个
开始考试点击查看答案A.5m
B.10m
C.15m
D.20m
开始考试点击查看答案A.20m
B.30m
C.40m
D.50m
开始考试点击查看答案A.200mm
B.300mm
C.400mm
D.500mm
开始考试点击查看答案A.煤层
B.软岩
C.泥岩
D.坚硬岩层
开始考试点击查看答案A.1470
B.1670
C.1770
D.1970
开始考试点击查看答案A.10
B.20
C.30
D.40
开始考试点击查看答案A.20
B.30
C.40
D.50
开始考试点击查看答案A.0.2
B.0.4
C.0.8
D.1
开始考试点击查看答案长理培训客户端 资讯,试题,视频一手掌握
去 App Store 免费下载 iOS 客户端