托福考试

【单选题】It can be inferred from paragraph 3 that Pasteur employed a swam-necked flask to(a) store sterilized liquids for use in future experiments(b) prevent heat from building up in a solution(c) disprove a criticism of his conclusions(d) estimate the number of organisms in a liter of air
网考网参考答案：C
网考网解析：
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