题目内容

红细胞破坏后,受何者清除

A. 单核一巨噬细胞系统
B. 单核细胞
C. 中性粒细胞
D. 脾
E. 肝

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以下不影响人血浆中晶体渗透压的物质是

A. 血液
B. 脑脊液
C. 氯
D. 葡萄糖
E. 尿素

What is the minimum period of time that the air supply for a self-contained breathing apparatus is required to last？________.

A. 10 minutes
B. 20 minutes
C. 30 minutes
D. 90 minutes

When steering by autopilot, how often should_______steering be checked？

A. every day
B. when time allows
C. At least once a watch
D. No checking is necessary

Which of the following is defined as static information？___________.

A. Navigational status
B. Safety related message
C. MMSI
D. Route plan