42. According to the relevant regulation, lifeboat should be powered by _______.

To check the setting of the overspeed trip on a diesel powered generator， you would use a （）.

词汇与结构 The flight controls are powered by _________ hydraulic sources: system A and system B.

All ground spoilers are powered by hydraulic system _____ through a control valve and a bypass valve.

AI-powered robots will be able to tackle dangerous situations better than human beings. Robots will play a more proactive role in maintaining city traffic and managing disasters.

New York and other U.S. cities have begun using vehicles powered by natural gas

Already there are many ( ) fuel vehicles on the market, powered by anything from solar power to natural gas.

【单选题】A. w ai ter B. tr ai n C. r ai n D. p ai r A. w ai ter B. tr ai n C. r ai n D. p ai r

AI-powered robots will be able to tackle dangerous situations better than human beings. Robots will play a more proactive role in maintaining city traffic and managing disasters. A: 正确 B: 错误

The boat in this story is referred to as a______. A: sunfish B: motor-and-sail powered launch C: small pleasure cruiser D: sloop