What are the key pieces we need to deal with an epidemic?
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From this speech, the evidence suggest that transmission is via_________.
A. droplets
B. air
C. blood
D. surface contact
From this speech, what should we do to practice good personal hygiene?
A. regularly wash our hands with soap and water
B. avoid touching our face with our hands
C. clean objects and surfaces that are touched often
D. avoid raw food and unclean water
凤头、猪肚、豹尾，你觉得新媒体文案的开头、主体、结尾有什么特点？
Word 2010默认的文件扩展名是( )。
A. doc
B. docx
C. dotx
D. docm
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