问题
单项选择题 A1/A2型题
铸造金属全冠邻面牙体预备应达到的要求是（）
A.消除患牙邻面的倒凹
B.与邻牙完全分离
C.形成协调的戴入道
D.预备出全冠修复材料所需要的邻面间隙
E.以上说法都正确
答案
参考答案：E
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铸造金属全冠邻面牙体预备应达到的要求是（）
A.消除患牙邻面的倒凹
B.与邻牙完全分离
C.形成协调的戴入道
D.预备出全冠修复材料所需要的邻面间隙
E.以上说法都正确
参考答案：E
It is interesting to visit another country, but there are some problems when you don’t know the 31 very well. It may be 32 to talk with the people there. We may not know how to use the telephone in the country that we are visiting. We may not know how to buy 33 we need. In a 34 country we might not know where to eat or what to order in a 35 . It is not easy to decide how 36 to tip waiters or taxi drivers. When we need help, we might not know how to ask for help. It is not pleasant to have an experience 37 that. 38 a short time, however, we learn what to do and what to 39 . We learn to enjoy life in another country and then we may be 40 to leave.
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