全口义齿后缘边界为（）
A.前颤动线
B.腭小凹之前方
C.腭小凹之连接线上
D.腭小凹后1mm
E.腭小凹后2mm
参考答案：E
He took pity on the people in the flooded areas and________his clothes and quilts to them. [ ]
A. gave away
B. gave off
C. sent out
D. threw away
图14-3-2所示结构B端的转角为（）。
A.A
B.B
C.C
D.D
