A head on situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and ___ . A. one sidelight and the masthead light are visible B. the vessels will pass closer than half a mile C. both vessels sound one prolonged blast D. both sidelights and masthead light(s) are visible

单选题

A head on situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and ___ .A. one sidelight and the masthead light are visibleB. the vessels will pass closer than half a mileC. both vessels sound one prolonged blastD. both sidelights and masthead light(s) are visible

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单选题

The situational approach is a situation-based language teaching method which focuses on _______.

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填空题

head（）

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单选题

A stand-on vessel is ____ .A. required to give way in a crossing situationB. required to sound the first passing signal in a meeting situationC. free to maneuver in any crossing or meeting situation as it has the right-of-wayD. required to maintain course and speed in a crossing situation but may take action to avoid collision

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单选题

the government official commented on the present economic situation with _____ satisfaction, saying that it is showing signs for the better.

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