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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. All of the following are finger foods EXCEPT(). A. soup B. sandwiches C. cookies D. hamburgers
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【单选题】关于蛋白质的α-螺旋结构的叙述,正确的是
A.
多肽链主链骨架羰基氧原子与 N-H基氢原子形成氢键
B.
脯氨酸和甘氨酸对 a-螺旋的形成无影响
C.
每个氨基酸残基沿螺旋中心轴旋转 100 °,向上平移 1.5nm
D.
每隔 3.6 个氨基酸残基上升 1 圈
【单选题】下列关于蛋白质α螺旋结构的叙述正确的是
A.
结构的稳定靠盐键
B.
是蛋白质三级结构的一种形式
C.
多为右手螺旋,结构的稳定主要靠氢键
D.
结构的稳定主要靠二硫键
【单选题】The notice of casualty to a ship must include ______.
A.
a request for assistance
B.
the location of the unit at the time of the casualty
C.
an estimate of the cost to repair damages
D.
the amount of fuel remaining
【单选题】下列关于α-螺旋结构的叙述,哪项是正确的
A.
属于蛋白质的三级结构
B.
多为右手螺旋,0.54个氨基酸残基升高一圈
C.
氢键起稳定作用
D.
盐键起稳定作用
【简答题】Operating expenses
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A.
每圈螺旋包含3.6个氨基酸残基
B.
脯氨酸、甘氨酸是α螺旋结构的破坏者
C.
结构的稳定靠侧链的相互作用
D.
结构的稳定靠氢键
【单选题】32 Which statement is NOT true of Covent Garden?
A.
It is crowded with people.
B.
It is located in London.
C.
It is filled with stalls.
D.
It is surrounded by shops, Churches restaurants and cafes.
【单选题】下列关于蛋白质 α 螺旋结构的叙述哪一个是正确的?
A.
结构的稳定靠盐键
B.
是蛋白质三级结构的一种形式
C.
多为右手螺旋,结构的稳定主要靠氢键
D.
结构的稳定主要靠二硫键
【单选题】关于α螺旋结构的叙述正确的是
A.
又称随机卷曲
B.
柔软但无弹性
C.
螺旋一圈由3.6个氨基酸残基组成
D.
只存在于球状蛋白质中
E.
属于左手螺旋
【单选题】All the historic sites within the range of Three Gorges Reservoir have been ______ to some new locations high above. [     ]
A.
transformed
B.
transmitted
C.
transferred
D.
transported
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