单项选择题

According to the passage, today’s ultralight airplanes ______.

A．are inexpensive but difficult to fly
B．are more like go-karts than like hang gliders
C．cannot climb as fast or as high as hang gliders
D．are not too different from the earlier aircraft

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热门试题

单项选择题

The author seems to feel that ultralight airplanes are ______.

A．a toy for the rich
B．nothing but hang gliders
C．a new development that meets the needs of aviation enthusiasts
D．the most important development in aviation since the Wright brothers' Flyer

单项选择题

In the last paragraph, the author thinks that pictures ______.

A．should be made comprehensible
B．should be made interesting
C．are of much use in our life
D．have disappeared from our life