与青霉素V抗菌谱最近似的是()
A.阿莫西林
B.阿帕西林
C.美洛西林
D.苯唑西林
E.青霉素G
参考答案:E
_______ the manager came to Beijing on business, he would visit his old friends there.
A.Every time
B.Many times
C.In no time
D.All the time
关于牙钳的使用,下列正确的是()
A.钳喙应尽量向根方夹持
B.夹持不可太紧,否则易断根
C.多个牙拔除时尽量选用万能牙钳
D.手掌握持时应尽量靠近牙钳关节
E.使用牙钳只能唇(颊)舌(腭)向摇动,否则易断根