空白试验主要是减免
A. 试剂误差
B. 仪器误差
C. 方法误差
D. 操作误差
下列措施为减小偶然误差的是
A. 多次测定取平均值
B. 回收试验
C. 对照试验
D. 空白试验
In consideration of the beauty of poems, __1__concludes that “the death of a beautiful woman is unquestionably the most poetical topic in the world”.
__1__is regarded as the father of psychoanalytic criticism and the detective story.
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