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【判断题】
红外吸收光谱的检测器通常为光电倍增管。
A.
正确
B.
错误
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【单选题】You cannot become a certified teacher without completing the prerequisite student teaching assignment.
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【简答题】Exercise Everyone hopes to live happily in the world. A happy life greatly depends on regular 1 . Both of them cannot be separated from each other. There is an old saying that life lies on exercise. T...
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