问题
单项选择题 A1/A2型题
不利于全口义齿稳定的因素是（）
A.人工牙排在中性区
B.侧方平衡
C.三点接触前伸平衡
D.多点接触前伸平衡
E.尖牙保护
答案
参考答案：E
解析：平衡
是全口义齿咬合形式与天然牙咬合形式的主要区别。全口义齿平衡有利于义齿的稳定。如人工牙排成天然牙的尖牙保护形式，在侧方运动时将会因尖牙早接触导致义齿翘动。故答案为E。
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不利于全口义齿稳定的因素是（）
A.人工牙排在中性区
B.侧方平衡
C.三点接触前伸平衡
D.多点接触前伸平衡
E.尖牙保护
参考答案：E
解析：平衡是全口义齿咬合形式与天然牙咬合形式的主要区别。全口义齿平衡有利于义齿的稳定。如人工牙排成天然牙的尖牙保护形式，在侧方运动时将会因尖牙早接触导致义齿翘动。故答案为E。
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| Jimmy 1 in the village (村庄), and he loves 2 in the river near his house, but his father gets a job in a big city (城市), and he moves there 3 his family. Their new house has a garden, but the garden is very small. Jimmy 4 very happy. "Is there a river 5 ?" he 6 his mother on the first morning. His mother answers, "No, there isn't, but there is a beautiful park near here. And there's a pool in it. We are going there this afternoon." Jimmy is happy now. 7 lunch, Jimmy and his mother go to the park. Jimmy wants 8 near the pool, but there is a sign in front of it. His mother reads it to him, "Warning: This pool is very dangerous (危险的). 400 people have fallen into (掉进) it." Jimmy 9 the pool carefully (仔细地), and says, " 10 I can't see them". | ||||
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