单项选择题
A.5CM; B.2-3CM; C.1.5-2CM
A.300MM; B.400MM; C.500MM
A.1/2; B.1/4; C.1/3
A.2φ8; B.2φ6; C.2φ4
A.240mm×370mm; B.370mm×370mm; C.500mm×370mm
A.1M; B.1.5M; C.2M; D.2.5M
A.民用建设; B.居住建设; C.工业建设; D.生产类
A.米; B.分米; C.厘米
A.20天; B.28天; C.30天
A.L; B.T; C.J
A.KB; B.WB; C.MB