A. overuse face masks B. deal with the mask problem seriously C. rub their faces and noses in the subway D. protest against the

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问题 A. overuse face masks
B. deal with the mask problem seriously
C. rub their faces and noses in the subway
D. protest against the mask guidelines
E. help protect people from being attacked by a flu
F. announce the results of their mask research
The public will not know the answer about masks until scientists ______.

选项

答案F

解析

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本试题收录于：职称英语理工类B级题库职称英语分类

职称英语理工类B级

职称英语

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A. overuse face masks B. deal with the mask problem seriously C. rub their faces and noses in the subway D. protest against the

职称英语理工类B级

职称英语

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