含有三个胚层组织成分的肿瘤称为()
A.间叶瘤
B.混合瘤
C.畸胎瘤
D.错构瘤
E.迷离瘤
参考答案:C
.He is a student at Oxford University,_______for a degree in computer science.
A.studied
B.studying
C.to have studied
D.to be studying
下列关于真性囊肿描述中,不恰当的是
A.为圆形或椭圆形囊腔性病变
B.囊腔内含液体或半流体物质
C.由无上皮衬里的纤维组织构成囊壁
D.不是真性肿瘤
E.可发生在软组织或骨组织