词汇与结构The airport itself has special considerations for low visibility operations including different lighting for approach, runways, and taxiways as well as the location of ____ equipment.
A. abnormal
B. normal
C. emergency
D. urgency
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词汇与结构A pilot of an aircraft in instrument ____ conditions, by the means of radio, GPS or INS navigation with no assistance from air traffic control, can navigate to the airport.
A. meteorological
B. environmental
C. climatic
D. atmospheric
蛤蚧属于
A. 鱼纲
B. 两栖纲
C. 爬行纲
D. 哺乳纲
鲩鱼属于
A. 肉食性
B. 草食性
C. 杂食性
有人认为葛洲坝水枢纽工程的建设，不会影响我国长江中某种珍贵动物的自然繁殖，这里所说的珍贵动物指
A. 白鳍豚
B. 鲥鱼
C. 中华鲟
D. 扬子鳄
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