The two parts reached no solution on the final item()
A. which is the Mark 2 project.
B. which I would like you to have.
C. that the process can be made simpler.
D. that values his new ideas.
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对食品卫生的要求是:无毒,无害,满足营养要求,还要有色香味等感观等要求。
A. 正确
B. 错误
可感阈值是()人群(一般为50%)能将这种气味与()空气以不定义区别开来的气味浓度。
用标准电能表法检定电能表时,规程中规定对2.0级电能表应不少于3转,这是指()的转数。
灭火消防车、供水消防车和通讯指挥消防车,凡发动机运转累计时数满()h的,应予退役。
A. 1000
B. 1500
C. 2000
D. 2500