A.
B.
C.
D.
[单选题]A.B.C.D.
[单选题]A.4B.3C.2D.1
[单选题]A.嵴B.窝C.沟D.点隙E.舌面隆凸
[单选题]A.0.273;-48B.0.273;48C.0.294;-48D.0.294;48
[单选题]A.20B.30C.40D.50