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The Germans have the following special rules for dining:
1.Knives and forks that are intended for eating fish cannot be used to eat meet or cheese.
2.If one drinks both beer and grape wine,it is advisable to start with beer,to be followed with wine.Otherwise,it will be regarded as being harmful to one's health.
3.It is not advisable to pile too much food on one's plate.
4.One may not use the napkin as a fan.
5.Don't eat walnut.