A.弯沉计测量 B.比例尺测量 C.现场试验 D.罐车压力表是否为零及管口无水泥
A.90% B.93% C.95% D.98%
A.900 B.930 C.970 D.1000
A.50~60 B.60~90 C.20~30 D.30~60