实用新型和外观设计专利权的期限是( )年,自申请日起计算。
A.5B.8C.10D.15
参考答案:C
You ______ drink wine before driving, or the police will take your license away.[ ]
A. don't have to
B. needn't
C. mustn't
D. may not
具有息风镇痉、攻毒散结、通络止痛功效的药物是()。
A.全蝎、蜈蚣
B.地龙、僵蚕
C.龙骨、牡蛎
D.石决明、决明子
E.天麻、钩藤