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如图所示，是光在空气和玻璃两种介质中传播的情形，下列说法正确的是（ ） A．入射角等于30° B．折射角等于50° C．NN′是界面 D．MM′的右边是玻璃
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【判断题】Listen to a short conversation, and then look at the statements below. Write a "T" in front of a true statement and an "F" in front of a false one according to the recording. The conversation will be ...
A.
正确
B.
错误
【判断题】Listen to a short conversation, and then look at the statements below. Write a "T" in front of a true statement and an "F" in front of a false one according to the recording. The conversation will be ...
A.
正确
B.
错误
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