氢气侧压力调整器的排气动作次数是氧气侧压力调整器排气动作次数的()倍。
A.1
B.2
C.3
参考答案:B
只有掌握公共权力的人才能腐败。
The Bill of lading signed by the shipping company is()
A.S-B/L (Sea-B/L)
B.V-B/L (Vessel-B/L)
C.Seaway Bill
D.Ocean-B/L