It's time to say goodbye ____________ my friends.[ ]
A. of
B. to
C. into
答案:B
整形外科手术局部麻醉方法选择正确的是()
A.神经丛阻滞
B.局部浸润麻醉
C.蛛网膜下腔麻醉
D.局部浸润麻醉加基础麻醉
E.硬膜外阻滞
怎样制作、使用种子标签?