You are preparing to take another vessel in tow．Which signal indicates，Hawser is made fast
A. Firing of a green star signal
B. Firing of a red star signal
C. An orange smoke signal
D. Three white star rockets at 1-minute intervals
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When steering by hand，which of the following may be a functional input to the steering gear as a result of turning the wheel ________．
A. Non-follow-up
B. Rudder adjustment
C. Weather adjustment
D. All the above may be activated
There are two areas off the N coast of France，which remain dangerous because of ______．
A. the density of vessel traffic on passage through the strait
B. the fact that the passage through the strait is constricted by a series of narrow banks，running NE-SW
C. mines lied in the war of 1939-1945
D. the strong tidal streams in the strait
兔疫比浊法的优点不包括
A. 简便快速
B. 易于自动化
C. 无放射性污染
D. 能进行批量检测
E. 使用吖啶酯为标记物
具有抗碱能力的血红蛋白有
A. HbA、HbA2和HbF
B. HbF和HbS
C. HbF、Hb Barts和HbH
D. HbE和HbG
E. HbF、HbA2和HbH
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