A.1個(gè)B.不設(shè)C.不少于2個(gè)D.2個(gè)
A.30~35m B.35~40m C.40~60m D.60m
A.1~2L/(m2⋅d) B.2~3L/(m2⋅d) C.1~3L/(m2⋅d) D.3~4L/(m2⋅d)