可摘局部义齿优于固定义齿是因为
A．磨除牙体组织少，易于保持口腔卫生B．舒适、美观C．强度好D．咀嚼效率高E．以上都对
参考答案：A
--Did your brother know ?
--No，I didn’t tell him about it．
A．where do you work
B．Where you worked
C．Where did you work
D．Where are you working?
在实际航海中，为什么要把等角航线和大圆航线结合起来航行.
