“没有无权利的义务,也没有无义务的权利。”这句话主要说明
A.任何人都享有同等的权利和义务
B.权利和义务是统一的
C.权利和义务是对立的
D.权利和义务之间并没有界限
答案:B
22. –Are you still very busy? --Yes, I _____ the report for the manager and it won’t take long.
A.have just finished
B.am just finishing
C.had just finished
D.am just going to finish
具有挥发性的是()
A.麻黄碱
B.小檗碱
C.咖啡因
D.槟榔碱
E.罂粟碱