问答题

As the author sees it, it will be impossible to know the exact number of the victims of the earthquake because all their traces have been erased by the flames.

答案: B. 错误
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当分光光度计无检测工作时,清理后切断电源。有样品滴漏在分光测量室里或表面上要及时用软布沾水擦洗干净()

A.正确
B.错误
答案: A.正确分光光度计在不使用时应关闭电源以节省能源并避免不必要的损耗。同时,保持仪器的清洁是非常重要的,因为样品的滴漏可能...
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