B The first step for the accomplishment of every act is the attitude of the person who wants to do something with his life. If you are the type of person who is always optimistic and has faith in your
The use of the word imitation（模仿） reminds me that we ought to make some more comments on the risk of people imitating what they see on the screen in the way of crime（犯罪） or violence. F
膜、杀菌物质