The ancient Chinese bird-kites were usually made of light frames covered with ______. Which of the following statements is NOT

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问题 The ancient Chinese bird-kites were usually made of light frames covered with ______.
Which of the following statements is NOT true?

选项 A、The frame of a kite is attached to a long string held in the hand or wound on a drum.
B、The ancestor of the double box-shaped body had three wings.
C、The cutter kite has a diamond-shaped body had no wings.
D、The current folding kite is developed to test theories of flight.

答案D

解析
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