You have runners, ____________ do you have a T-shirt?[ ]
A. and
B. but
答案:B
输卵管复通术可采用下列哪种麻醉方法
A.腰麻
B.连续硬膜外麻醉
C.联合腰麻硬膜外
D.全麻
E.局麻
农业生产的特性与规律