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【多选题】
当分光光度计100%点不稳定时,通常采用()方法处理。
A.
查看光电管暗盒内是否受潮，更换干燥的硅胶
B.
对于受潮较重的仪器，可用吹风机对暗盒内、外吹热风，使潮气逐渐地从暗盒内跑掉
C.
更换波长
D.
更换光电管
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【单选题】' In my first week I had to make a presentation about food testing in front of 300 staff,' she recalls.‘They were bored for the whole time, mainly because I had no idea how to do it. This experience m...
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