题目

—How come everything tastes bitter? —Well, things ________ taste different to you when you are suffering a cold. A.may  B. should  C. must  D. would 答案:A下图所示为光线以相同的入射角从空气进入3种不同介质时的折射情况.光在哪种介质中的速度最小? [  ] A.甲介质;B.乙介质; C.丙介质;D.3种介质中光速一样.
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