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【单选题】
签证是主权国家官方机构发给申请者出入该国国境或外国人在该国国内()的许可证明,是附签于申请人所持入出境通行证件上的文字注明,也是一个国家检査进入或经过这个国家的人员身份和目的的合法性证明。A.
停留、居住
B.
停留、旅行
C.
旅行、学习
D.
旅行、居住
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【单选题】What is ship’s heading? Ship’s heading is the direction _____.
A.
the vessel is pointing
B.
the vessel is traveling relative to land
C.
the vessel is traveling relative to ground
D.
the vessel is drifting
【单选题】What is ship’s heading? Ship’s heading is the direction where ( ).
A.
the vessel is pointing
B.
the vessel is traveling relative to land
C.
the vessel is traveling relative to ground
D.
the vessel is drifting
【简答题】焦炭化过程是唯一能生产石油焦的工艺过程，是以（）（如减压渣油、裂化渣油以及沥青）为原料，在高温下进行深度（）反应的热破坏加工过程。
【单选题】When H2S is burned on a ship, what can you expect to occur?
A.
Only 80% of the H2S will be converted to SO2 or free sulfur
B.
The H2S not converted will not be dangerous
C.
All of the H2S will be converted to SO2
D.
All of the H2S will be converted to hydrogen and free sulfur
【多选题】焦炭化过程(简称焦化),是以渣油为原料、在高温(500~550oC)下进行深度热裂化反应的一种热加工过程。包括以下哪些工艺过程
A.
延迟焦化
B.
流化焦化
C.
灵活焦化
D.
釜式焦化
【单选题】What is ship’s heading? Ship’s heading is the direction where ______.
A.
the vessel is drifting
B.
the vessel is traveling relative to land
C.
the vessel is traveling relative to ground
D.
the vessel is pointing
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