问题
单项选择题
上颌中切牙缺失可摘局部义齿修复，若选用的成品人工牙过宽，排牙时主要应磨改的是
A．唇面切缘
B．唇面颈缘
C．唇面
D．舌面
E．邻面和舌侧轴面角
答案
参考答案：E
解析：磨改邻面和舌侧轴面角以减少人工牙的近远中径。
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上颌中切牙缺失可摘局部义齿修复，若选用的成品人工牙过宽，排牙时主要应磨改的是
A．唇面切缘
B．唇面颈缘
C．唇面
D．舌面
E．邻面和舌侧轴面角
参考答案：E
解析：磨改邻面和舌侧轴面角以减少人工牙的近远中径。
y Birthday to You when we think of it. 1 , there are different birthday celebrations.
he world, birthdays 3 (celebrate) in many different ways.
hem. Irish people lift birthday children upside down and hit them 7 
(light) on the floor for every year of their age. 
Mexico also has a unique birthday tradition. A paper-made animal is filled 8 candy and toys and hung from the ceiling. The birthday child with his eyes covered then 9 (try) to hit the ani
mal with a stick_____10___ it bursts open.