患者，男，36岁，3个月前因外伤一上前牙脱落，今要求烤瓷修复。口腔检查：缺失，间隙正常，牙槽嵴无明显吸收。牙冠1／2缺损，已露髓，探稍敏感，叩诊阴性，无松动。牙冠良好，叩诊阴性，无松动。GI：0～2，OHI-S：0～3。余牙未见异常。
下列哪项不是修复前进行的必要的检查和治疗工作（）
A.前牙区根尖片
B.根管治疗
C.根管治疗
D.牙周洁治
E.取研究模型
参考答案：C
| 阅读理解。 阅读下面的短文，根据所读内容在文章后的表格中填入恰当的单词。 注意：表格中的每个空格只填1个单词。 | |||||||||||||||||||||||||||
| Different countries and different people have different manners. We must find out their customs, so that they will not think us ill-mannered. Here are examples of the things that a well-educated person does or does not do. If you visit a Chinese family you should knock at the door first. When the door opens, you will not move before the host says"Come in, please." After you enter the room, you should not sit down until the host asks you to take a seat. When a cup of tea is put on a tea table before you or sent to your hand, you will say," Thank you." And receive it with two hands, not one hand, or they will think you are ill-mannered. Before entering a house in Japan, it is good manners to take off your shoes. In European countries, even though shoes sometimes become very dirty, this is not done. In a Malay house, a guest never finishes the food on the table. He leaves a little to show that he has had enough. In England, a guest always finishes a drink or the food to show that he has enjoyed it. This will make the host, especially the hostess pleasant.
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