血管介入放射学插管操作最常用的抗凝药物是（）。
A.维生素K1
B.肝素钠
C.阿司匹林
D.潘生丁
E.尿激酶
参考答案：B
He has some trouble ____ his classmates but he has no trouble ____ doing his lessons. [ ]
A. with; with
B. with; in
C. in; in
D. in; with
呕吐伴寒战、发热、右上腹疼痛应考虑
A．急性胰腺炎B．急性胆囊炎C．急性胃肠炎D．急性阑尾炎E．以上都不是
