问题
多项选择题
结核分枝杆菌主要致病物质包括( )
A．荚膜
B．内毒素
C．蛋白质
D．脂质
答案
参考答案：A,C,D
解析：结核分枝杆菌不产生内、外毒素，无侵袭性酶，其致病性可能与细菌在组织细胞内大量繁殖引起炎症、菌体成分及代谢产物的毒性以及机体对菌体成分产生的免疫损伤有关。与致病性有关的致病物质有：脂质、蛋白质和多糖(结核分枝杆菌的荚膜成分主要是多糖)。
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结核分枝杆菌主要致病物质包括( )
A．荚膜
B．内毒素
C．蛋白质
D．脂质
参考答案：A,C,D
解析：结核分枝杆菌不产生内、外毒素，无侵袭性酶，其致病性可能与细菌在组织细胞内大量繁殖引起炎症、菌体成分及代谢产物的毒性以及机体对菌体成分产生的免疫损伤有关。与致病性有关的致病物质有：脂质、蛋白质和多糖(结核分枝杆菌的荚膜成分主要是多糖)。
What’s your idea about success? Some people say that beginners have all the luck, while others believe that success only with practice. In fact, I fell both of these statements are not true all the time. Each is true in some ways not in others. For example, I went to a drawing competition many years ago and surprisingly. As a prize, I got a film ticket to see “Titanic”. I was really because it was the first time I had taken part in any competition, Thinking that I might be lucky again, I joining in other art competitions, ‘But the result was that I won again. I accepted the fact that the other people had a artistic ability than I did. Art was not something I was especially interested in and I had never practiced the different art skills. So, the I produced were not of a very high standard These experiences taught me a lot. Though I might have been lucky , I also need to put in hard work. As we know, akes perfect. So I believe success builds on less luck and chance.
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