以下哪项口腔保健服务应包括口腔健康教育
A. 集体刷牙
B. 窝沟封闭
C. 氟水漱口
D. 服用氟片
E. 以上都是
What did Mary Meeker's words mean
A. The game is over in the retailing market.
B. The battle between the traditional retailers and modern online ones is over.
C. Online retailing has already occupied the predominant position over their physical-world competitors in some categories.
D. The online retailers have destroyed the value of traditional retailers' properties.
Which of the following is NOT TRUE according to the second paragraph
A. More and more people use the Internet because it is a convenient means of communication.
B. Most people still choose traditional shopping for the sake of the physical enjoyment of shopping, despite the high efficiency of online shopping.
C. The beliefs mentioned in the first paragraph are mostly wrong.
D. It is hard for the holders of the internet-will-win belief to understand why they are wrong.
慢性缩窄性心包炎，与下列疾病相鉴别，应除外
A. 二尖瓣关闭不全所致的心力衰竭
B. 心肌病
C. 肝硬化
D. 尖瓣狭窄所致的心力衰竭
E. 主、肺动脉间隔缺损
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