— Can you teach me ping-pong? — Sure.[ ]
A. play
B. to play
C. plays
D. playing
答案:B
麻醉强度及毒性为"1",常作为其他局麻药物比较标准的局麻药物是()
A.普鲁卡因
B.阿替卡因
C.丁卡因
D.利多卡因
E.丁哌卡因