你可能感興趣的試題

A.0.1%
B.0%
C.1%
D.以上都錯(cuò)

A.1/4-1/3
B.1/4-1/2
C.1/3-1/2
D.1-1/4

A.0.2-0.45MPa
B.0.2-0.55MPa
C.0.2-0.65MPa
D.0.45-0.65MPa

A.300-350
B.280-300
C.400-450
D.380-400

A.50
B.40
C.30
D.20

A.1
B.2
C.3
D.4

A.7-7.5
B.8-8.6
C.8.5-9.0
D.8.0-9.0

A.≤10ppb
B.≤12ppb
C.≤15ppb
D.≤20ppb

A.≤10ppb
B.≤12ppb
C.≤15ppb
D.≤20ppb

A.10min
B.15min
C.30min
D.60min