题目内容
患者右上第一中切牙扭转近90°，且伴有唇侧倾斜，牙髓正常，牙根长大，牙槽骨轻度吸收，牙龈红肿，探易出血。 如果选择桩冠修复，则此牙根充后桩冠开始的最早时间可能是
查看答案
搜索结果不匹配？点我反馈
更多问题
就给定资料，自选某一角度，自拟标题，写一篇幅 1000字左右的文章。要求中心明确，内容充实，论述深刻，有说服力。
债券质押式回购交易实行质押库制度。( )
在我国，询价分为初步询价和累计投标询价两个阶段。发行人及其保荐机构通过初步询价确定发行价格区问，通过累计投标询价确定发行价格。( )
阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。How the Body Keeps the Same Temperature The temperature of your body should be always just the same, no matter whether the weather is trot or cold. That is why the doctor uses his thermometer when you are sick. When you are well,your temperature is ninety-eight and six tenths degrees. If he finds it (51) than that,it is a sure sign that something is wrong. The body keeps the same temperature all the time,because it balances (平衡) the heat it produces and (52) off. It is always burning up food and producing heat. It can produce heat faster when it needs to or give off heat faster when it becomes too warm. Let’s see (53) this happens. The heat of your body is given off chiefly through the skin. When you are (54) ,your skin is tight and shows "goose flesh". When you get chilly (寒冷的),you must dance around to keep warm or (55) you will shiver (颤抖). (56) your muscles begin to work,burn up fuel,and produce more heat. It is not (57) to shiver,so you usually prefer warming up by exercise, or put (58) more clothes to keep heat in. When you are warm,the skin is loose and soft. It is so supplied (59) blood that heat is given off rapidly. If you get too hot,you begin to sweat,and (60) body heat is used in evaporating (蒸发) the moisture (潮湿) from your skin. You wear less clothing, too, in warm (61) or in a warm room,so that warmth can be given off freely. You feel you don’t (62) exercising because your body is warm (63) ,and the extra heat produced by exercise makes you uncomfortable. You can see from this why you (64) differently in different kinds of weather. In summer,when it is warm,you feel tired and lazy. You do not care to work or play,but enjoy lying and doing nothing. When you get out of doors in winter,the cold air makes you feel (65) . You want to run and play.
微信支付 
支付宝支付