A.4‰;1.5‰
B.4‰;2‰
C.4‰;1‰
D.1.5‰;1‰
A.≤3/1000、≤1/1000
B.≤4/1000、≤2/1000
C.≤5/1000、≤3/1000
D.≤6/1000、≤4/1000
A.1/1000
B.2/1000
C.3/1000
D.4/1000
A.1/1000
B.2/1000
C.3/1000
D.4/1000
A.1
B.2
C.3
D.4
A.4/1000
B.3/1000
C.2/1000
D.1/1000
A.1‰
B.2‰
C.3‰
D.4‰