【Active participation for mutual improvement: 1.16–1.22 – +2 for participation, +3~10 for correct wealth】
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Multiple-choice question: 2 points for active participation, 2 points for each correct answer, 10 points for answering all questions correctly; no points for selecting incorrect answers, and no points for resubmitting the answer. Which of the following are standard materials in our country? A Standard material for the analysis of chemical product components B Safety and hygiene standards C Standard material for the analysis of food components D Standard material for the analysis of building material components Answer: ACD
A, C, D,---------------------------------
The following are standard materials in our country (A C D). A Standard material for the analysis of chemical product components B Safety and hygiene standards C Standard material for the analysis of food components D Standard material for the analysis of building material components
Which of the following is a national reference material in our country? (D) A Standard material for the analysis of chemical product components B Safety and hygiene standards C Standard material for the analysis of food components D Standard material for the analysis of building material components