全口义齿后牙选用无尖牙的优点不包括（）。
A.侧向力小
B.有利于义齿的稳定
C.容易达到平衡鸦
D.对牙槽嵴损害小
E.咀嚼效率低
参考答案：E
---Did Tom win the 200-meter race at our sports meet?
---Of course not. I’m a poor runner and he did _______ than I.
A．as well as
B．no better
C．no worse
D．not better
一批调车作业变更辆数超过三钩时，应重新下达书面计划。
