The word "punctual’ most probably means()
A. leaving soon after class
B. coming early
C. arriving a few minutes late
D. being on time
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26()
A. tends
B. wants
C. hopes
D. means
30()
A. less
B. greater
C. worse
D. few
21()
A. clothing
B. costume
C. uniform
D. cloth
缓冲蛋白胨水用于
A. 副溶血性弧菌检验前增菌
B. 食品中致泻大肠埃希菌检验前增菌
C. 食品中菌落总数测定
D. 冻肉等食品中沙门菌检验前增菌
E. 食品中大肠菌群测定