問題詳情

    By looking at the natural world, inventors are able to solve problems and___21___ new ideas. When the Wright Brothers invented the airplanes, ___22___,they first carefully observed how birds fly, and then ___23___ what they had learned___23___ their invention. Other inventions that have been inspired by nature___24___ Velcro, which was based on observations of burs, and a type of“self-cleaning” house paint, which was based on observations of lotus leaves.___25___, nature’s designs can provide us with many valuable lessons.
21.
(A) put up with
(B) come up with
(C) hang out with
(D) catch up with

參考答案

答案：B
難度：適中0.6
統計：A(1),B(3),C(0),D(0),E(0)

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