问题
单项选择题
某患者，一上前牙牙冠大部缺损，作桩冠修复时，根管制备的长度应达根长的
A．1/5～2/5
B．3/5～4/5
C．1/4～1/2
D．1/2～1/3
E．2/3～3/4
答案
参考答案：E
解析：桩核中桩的长度应达到根长的2/3～3/4。
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某患者，一上前牙牙冠大部缺损，作桩冠修复时，根管制备的长度应达根长的
A．1/5～2/5
B．3/5～4/5
C．1/4～1/2
D．1/2～1/3
E．2/3～3/4
参考答案：E
解析：桩核中桩的长度应达到根长的2/3～3/4。
| 完形填空。 One day a great general ( * * ) asked his soldiers, "What's the strongest power in the world?" Four of his soliders 1 their hands. They all wanted to answer the question. The general asked the first man to speak. The first man is younger 2 the other three, and he was not strong. He said, "My gun is the strongest. It can kill 3 ." "Thank you. 4 , please."The second man was very strong. He said,"I don't 5 . Soldiers use guns, so the soldier is the strongest."The 6 man said, "Soldiers use guns, 7 our general gives orders (命令).So I think our general is the strongest."The fourth man was the 8 . He said, "Love is the strongest. For love people don't 9 guns."The general smiled and 10 to him. | ||||
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