切断刀、车槽刀和距片铣刀等，由于受刀头强度的限制，副后角αˊ。应取（）.
A.较大
B.一般
C.较小
参考答案：C
关于种植模板下列说法正确的是（）
A.确定理想的种植体植入位置
B.确定理想的种植体植入位置、方向和分布
C.判断种植部位的骨量和骨质
D.确定种植义齿的美观效果
E.判断种植义齿的修复效果
单句改错。
( )1. Watching movies to learn English is frustrated.
A B C D
( )2. The dead of her little cat made her very sad.
( )3. Should teenagers be allowed surf the Internet?
( )4. She would also rather stay at home than to go to a party.
( )5. This book must belong to Tom's.
