【单选题】【消耗次数：1】
下列哪种结构可对内釉上皮细胞有营养和缓冲作用（）
①
中间层细胞
②
星网层细胞
③
外釉上皮细胞
④
釉丛
⑤
釉龛
参考答案：
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【判断题】
An effective precis is based on precise and thorough reading and understanding of the article.
①
正确
②
错误
【判断题】
The wording of notes always remain the same regardless of the relationship betwee the addresser and the addressee.
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正确
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In an English letter, the complimentary close like yours, or Yours Sincerely is put below the signature.
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正确
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Compared with letters, notes are generally of high informality in diction and format as well.
①
正确
②
错误
【判断题】
In precis writing, you can rearrange the main points in the orignal passage in your own way.
①
正确
②
错误
【单选题】
A precis is about [] of a written material.
①
viewpoint
②
structure
③
organization
④
main idea
【单选题】
in a longer notice, the information should be well organized under titles and [].
①
groups
②
headings
③
columns
【单选题】
A notice is a written or printed [] displayed in public.
①
note
②
warning
③
announcement
【单选题】
A note has three essential components the addressee, the sender and [].
①
date
②
solution
③
message
④
complimentary close
【单选题】
A precis should be concise; that is, it should be [] than the original material.
①
complicated
②
clearer
③
simpler