单项选择题

The author finds great similarity between ______.

A．the weight of the hang glider and that of the ultralight airplane
B．ultralight airplanes and military aircraft
C．the inventiveness of John Moody and that of Dctave Chanute
D．the controls used in the Wright brothers' Flyer and those used in today’s ultralight airplanes
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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
单项选择题
Which of the following statements is TRUE
A．The Egyptian signs later became a particular alphabet.
B．The Egyptians liked to write comic-strip stories.
C．The Roman alphabet was developed from the Egyptian one.
D．The Greeks copied their writing system from the Egyptians.
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