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It is not only a greeting, it also means “ _________” and “ I'm sorry .”

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Handshakes in the United States and Canada are _____________.

Handshakes in Mexico and Egypt usually last a little longer , but___________.

已知dremel的一个文档模式是:Message Document{Required int64 DocId;Optional group Links{Repeated int64 Backward;Repeated int64 Forward;}Repeated group Name{Repeated group Language{Required string Code;Optional string Country;}Optional string Url;}}现有两条记录:DocId:10Links:Backward:10Forward:80NameLanguageCode:en-usUrl:http://CDocId:20NameLanguageCode:enCountry:usLanguageCode:en-usNameUrl:http://A请参考书中例题,给出各值的列存储结果。

角膜( )

A. 占外膜前1/3
B. 占外膜前2/3
C. 富含血管
D. 富含神经末梢

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