问题
单项选择题
对牙周组织损伤最大的力是
A．牵引力
B．斜向力
C．垂直压力
D．水平压力
E．扭力和旋转力
答案
参考答案：E
搜题请搜索小程序“爱下问搜题”
对牙周组织损伤最大的力是
A．牵引力
B．斜向力
C．垂直压力
D．水平压力
E．扭力和旋转力
参考答案：E
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| Most people who work in London get a break of about an hour for lunch. 1 they mostly live too far from home to go back there 2 lunch, they have to 3 other arrangements for their midday meal. Many large companies have a canteen (自助食堂) for their employees. In 4 canteens the food served is simple but 5 , and there is some 6 of choice. But the number of dishes 7 usually small. The employees themselves fetch their dishes 8 a counter at which they are 9 . There they can find a tray on 10 to carry their knives, forks, spoons, plates, cups, saucers, 11 , of course, their food. A meal in a canteen is inexpensive and may 12 of soup, fish and chips or meat and two vegetables, 13 fruit or pudding of some 14 as dessert. Some companies that do not run a canteen 15 their staff with luncheon-vouchers (午餐券), which many restaurants will accept in 16 of money. As there are so many people 17 work in London, there are numerous cafes and restaurants in every area that is not purely residential. A meal 18 cost anything from a modest sum to quite a few pounds, 19 on the restaurant and the food chosen. 20 , one can generally get a meal, or at least a snack, in a pub. In recent years there has also been a big increase in the number of 'take-away' food shops of all kinds. | ||||
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