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寻常性天疱疮的表现是
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DOs and DON’TsThe following DOs and DON’Ts may help you to avoid becoming the victim of a pickpocket.DO carry with you only what you need; leave in your hotel’s safe such valuables as jewelry, airline tickets, travelers checks, credit cards, extra cash and your passport. Once admitted to France, American tourists do not have to carry passports at all times, a student card or driver’s license usually is enough if you are asked by a police to officer for identification.DO carry your passport separately from your wallet or handbag~ This is not always feasible for women, but men can carry their passports in a front pants pocket or inside jacket pocket.DON’T have one family or group member carry everyone’s passport; never put a group’s passports in the same bag or briefcase.DON’T leave your valuables in a locked car, locks are easily opened by experts, the trunk is not safe either.DOs:1. Put valuables in your(1) .2. Besides student card, showing(2) is enough when asked by the police.3. Men can put (3) inside jacket pocket.DON’Ts:1. Don’t put(4) passports in the same bag.2. A (5) car is not necessarily safe. 4（）
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In England, afternoon tea, taken between four and five, is the most (1) meal of the day. If you are a friend of the family, you may drop in for tea without an(2) or telling you are coming. Very often it is not (3) at a table. The members and (4) take tea in the sitting-room. Each person has a cup and saucer, a spoon and a small plate for bread-and-butter and cake. By the way, do not help yourself to cake first, bread-and-butter first, then cake if there is any. Another piece of (5) : do not put more than one piece of bread or cake at the same time. 4（）
银汞合金是历史悠久的充填修复的材料，具有强度高、可塑性好、操作方便、与牙体组织密合等优点，近年来还在不断改进，提高性能 高铜银汞合金抗腐蚀性好，强度增加，原因是减少或基本消除了固化物中的
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