40.上顎大臼齒的那個咬頭(cusp)有兩個嵴(ridge)分別連接形成橫嵴(transverse ridge)與斜嵴
(oblique ridge)?
(A)近心頰側咬頭(mesiobuccal cusp)
(B)遠心頰側咬頭(distobuccal cusp)
(C)近心舌側咬頭(mesiolingual cusp)
(D)遠心舌側咬頭(distolingual cusp)
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統計: A(57), B(44), C(952), D(16), E(0) #3280130
統計: A(57), B(44), C(952), D(16), E(0) #3280130