下颌体长度的增加是靠（）。
A.下颌支前缘增生新骨
B.下颌体内侧增生新骨
C.下颌支后缘增生新骨
D.下颌支外侧吸收陈骨
E.以上都不是
参考答案：C
How can you expect him to make any improvement________ you never give him a chance to have a try?[ ]
A. unless
B. when
C. until
D. even if
“单价”栏：( )。
A．805
B．0.8063
C．0.8050
D．0.7363
