公路水运工程试验检测员 (水运材料)土、水、外加剂类单项选择题每日一练(2019.05.05)

A.不变
B.增加
C.降低

A.40mm
B.50mm
C.60mm
D.65mm

A.6min
B.8min
C.10min
D.15min

A.3%
B.5%
C.7%
D.10%

A.细砂
B.中砂
C.粗砂
D.石屑