络穴共有()。
A.12个
B.15个
C.16个
D.18个
E.20个
参考答案:B
Don't play a trick _______ him. He's my new classmate.[ ]
A. at
B. to
C. for
D. on
肝脏海绵状血管瘤()
A.快进快出
B.快进慢出
C.边缘单环、双环或三环
D.无强化
E."晕圈征"