在原始骨痂形成期中,发展较快的是()
A.腔内化骨
B.软骨内化骨
C.环状骨痂
D.膜内化骨
E.周围软组织骨化
参考答案:D
Ann has red hair and blue eyes. Tom has black hair and brown eyes. They have different _________. [ ]
A. hands
B. face
C. looks
D. hair
梗阻性黄疸常见()
A.脓血便
B.鲜血便
C.柏油样便
D.白陶土样便
E.稀汁样便