討論串[請益]TPO19聽力 lecture 2 16.
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有提到. How come people have to turn off their cell phones and all. our electronic devices when an. airplane is about to take off?. 其實這篇的結構很清楚. 先講講光學望遠鏡會
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TPO19 lecture 2 16.. 16. according to the prof., why do radio astronomers sometime. have difficulty studying very distant objects. 應選兩個選項. 但這個選項. Radi
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