The ancient Chinese bird-kites were usually made of light frames covered with ______. The ancient Chinese man-lifting kites wer

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问题 The ancient Chinese bird-kites were usually made of light frames covered with ______.
The ancient Chinese man-lifting kites were used ______.

选项 A、to carry ropes across rivers and valleys
B、for the military purpose
C、as toys for children
D、for fishing in strong sea wind

答案B

解析

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