穿透力最强的局部麻醉药是()。
A.普鲁卡因
B.丁卡因
C.利多卡因
D.左旋布比卡因
E.碳酸利多卡因
参考答案:B
Most computer users think it necessary for their software ________ regularly.
A.to up date
B.to be updated
C.to have been up dated
D.to have updated
胆红素在肝细胞内存在形式( )
A.硫酸胆红素B.胆红素-清蛋白C.胆红素-配体蛋白D.胆红素葡萄糖醛酸酯E.胆素原族