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Good Table Manners Manners play an important part in making a favorable impression at the dinner table. Here are some general rules： Napkin （餐巾） use The meal begins when the host unfolds his or her napkin. This is your signal to do the same， so place your napkin on your lap. Unfold it completely if it is a small napkin. Or in half， lengthwise （纵向地） ，if it is a large dinner napkin. If you need to leave the table during the meal， place your napkin on your chair as a signal to your server that you will be returning. Once the meal is over， place your napkin neatly on the table to the right of your dinner plate. Do not refold it. Use a napkin only for your mouth. Never use it for your nose， face or forehead. Use of utensils （餐具） Start with the knife， fork or spoon furthest from your plate， and work your way in， using one utensil for each course. If soup is served， remember to spoon away from yourself. This helps stop the drips. Do not put the entire soup spoon in your mouth. Instead， fill a soup spoon about 75 per cent with soup， and sip（啜饮）it from the side noiselessly. After finishing dinner， place the knife and fork parallel to one another across the plate with the knife blade facing inward toward the plate. Using your fingers Here's a list of finger foods： sandwiches， cookies， small fruits or berries with stems， French fries and potato chips， and hamburgers. Chew（咀嚼）with your mouth closed and don't make noise； don't talk with your mouth full. Bread must be broken with your hands. It is never cut with a knife. Don't pick something Out of your teeth. Instead， excuse yourself to the bathroom. If possible， try not to cough at the table. Do not put your elbows （肘） on the table. In France， it is essential to have both hands above the table at the same time. Do not put bones or anything else on the table. Things that are not eaten should be put on your plate. The napkin is used only for（）.
从防火基本原理来讲，“在建筑物之间设置防火防烟分区、筑防火墙、留防火间距”，是通过（）途径来提高防火性能。
物联网产业链有哪些关键环节？
对于法的本质和特征正确的理解有哪些？
砖石及混凝土结构中受压构件的强度计算内容包括（）或（）构件强度计算和（）构件强度计算。
近些年来，随着现代科技的日益更新和发展，计算机及其应用已经渗透到社会的各个领域，融入每个人的工作、学习和生活之中，掌握和使用计算机已经成为人们必备的技能。
背景 某幕墙公司通过招投标从总承包单位承包了某机关办公大楼幕墙工程的施工任务。承包合同约定，本工程实行包工包料承包，合同工期180个日历天。在合同履行过程中发生了以下事件： 事件一：按照合同约定，总承包单位应在8月1日交出施工场地，但由于总承包单位负责施工的主体结构没有如期完成，使幕墙开工时间延误了10d。 事件二：幕墙公司向某铝塑复合板生产厂订购铝塑复合板，考虑该生产厂具有与本工程规模相符的幕墙安装资质，幕墙公司遂与该厂签订了铝塑复合板幕墙供料和安装的合同。总承包单位提出异议，要求幕墙公司解除铝塑复合板安装合同。 事件三：对办好隐蔽工程验收的部位，幕墙公司已进行封闭，但总承包单位和监理单位对个别施工部位的质量还有疑虑，要求重新检验。 事件四：工程竣工验收前，幕墙公司与发包人签订了《房屋建筑工程质量保修书》，保修期限为一年。 指出事件四中《房屋建筑工程质量保修书》中的保修期限的错误，说明理由并修正保修期限。
合理的隧道开挖方案，应满足的要求有（）
皖江黄金水道之旅是我省主要推介的8条精品线路之一，从旅游产品类型上来说，此路线为（ ）。
摩擦纺纱中，芯纱（）越大，加捻效率越低。
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