Abeamoflightwillnotbend（弯曲）roundc

发布时间：2020-07-10 21:11:51

A beam of light will not bend（弯曲）round corners unless ________ to do so with the help of a reflecting device（反射装置）．













A.made












B.being made











C.having made











D.to be made

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A
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