This protects your clothes from food or is used to wipe your hands or mouth when necessary

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• This protects your clothes from food or is used to wipe your hands or mouth when necessary
• to start with,put the napkin on your lap.this protects your clothesTo start with,put the napkin on your lap.this protects your clothes from food or is used to wipe your hands or mouth when necessary..Hold the knife in your right hand and the fork in your left hand ,and cut the meat or fish into pieces as you eat.Always use your fork to put food in your mouth.Use your spoon only for soup.Do not put your own fork,knife and spoon into serving bowl.Do not
• This protects your clothes from food or is used to wipe your hands or mouth when necessary
• 式子丨2x-5丨-5所能去到的最小值是,此时x等于 式子8-丨2x-5丨所能去到的最小值是,此时x等于
• 式子2x-1的绝对值=2取最小值时,x=