肝细胞腺瘤的手术方式有().
A.肝叶切除术
B.囊内剜除术
C.肿瘤捆扎术
D.肝动脉结扎或栓塞术
E.内囊摘除术
参考答案:A, B, D
Not all of us know the difference ________ wheat, oats and barley.
A.among
B.between
C.from
D.in
6DB的电带宽,又称为()光带宽。
A.1D
B.B2D
C.3DB
D.6DB