2. 外语
  3. A. Reasons for Excluding Masks from the Self-protection List B. Effort to Stop Flu Spreading C. When to Use Face Masks

A. Reasons for Excluding Masks from the Self-protection List B. Effort to Stop Flu Spreading C. When to Use Face Masks

admin2009-07-11  60
问题 A. Reasons for Excluding Masks from the Self-protection List   
B. Effort to Stop Flu Spreading   
C. When to Use Face Masks   
D. Guidelines on Mask Use     
E. Warnings from the CDC    F. Danger of Infection through Germy Hands and Masks

选项
答案B
解析
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