下载APP
举一反三
【单选题】针对食人鱼非法进入我国的现象，生态专家环保人士呼吁，应尽快从法律层面建立、完善防护外来物种入侵的生态安全机制，________我国的生态安全。填入划横线最恰当的一项是：
A.
维护
B.
保护
C.
保持
D.
维持
【单选题】The report came to the British on May 21, 1941. The German battleship Bismarck, the most 1 warship in the world, was moving out into the Atlantic Ocean. Her task: to destroy the ships 2 suppli...
A.
end
B.
sea
C.
fight
D.
day
【单选题】最大指示空速用海里/时表示.（）
A.
The maximum instruction airspeeds are shown in nm per hour.
B.
The maximum indicated airspeeds are shown in nm per hour.
C.
The maximum instruction airspeeds are shown in knots.
D.
The maximum indicated airspeeds are shown in knots.