题目内容

紫外分光光度计常用的光源是

A. 氘灯
B. 钨灯
C. 溴钨灯
D. 硅碳棒
E. 荧光灯

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紫外可见分光光度法中所用的比色杯的材料是

A. 玻璃
B. 盐片
C. 石英
D. 有机玻璃
E. 塑料

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Some of my classmates at college were extremely talented, which sometimes____ me.

Everyone ____ a second chance, and people like him really do need to be helped.