问题
单项选择题
破伤风梭菌的致病因素是（）
A.内毒素
B.干扰素
C.外毒素
D.溶血素
E.分泌多种酶
答案
参考答案：C
解析：破伤风梭菌对人类的致病因素主要是它产生的外毒素，其毒素人血引起相应的临床表现。
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破伤风梭菌的致病因素是（）
A.内毒素
B.干扰素
C.外毒素
D.溶血素
E.分泌多种酶
参考答案：C
解析：破伤风梭菌对人类的致病因素主要是它产生的外毒素，其毒素人血引起相应的临床表现。
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| Do you know what kind of things the young people are reading? More and more 1 and parents have noticed another kind of pollution, which comes from the printed papers 2 on streets. These printed things 3 newspapers but have hardly anything to do with 4 . You can only find reading materials badly made up there-some are too strange for anyone to 5 , others are frightening stories of something 6 . However, many of the young readers are getting interested in such 7 reading, which 8 them what they should pay for their breakfast and brings them nightmares (噩梦) and immoral (邪恶) ideas in 9 . Homework is left 10 , and daily games are lost. These sellers shout on streets selling their papers well. The writers, publishers and printers, 11 they are, we never know, are 12 their silent money. The sheep-skinned wolf's story seems to have been forgotten once again. Why not 13 this kind of thing? Yes, both teachers and parents have asked each other for more strict control of the young readers. 14 , the more you want to forbid it, the more they want to have a look at it. 15 you may even find several children, driven by the curious natures, 16 one patched paper, which has travelled from hand to hand. It really does 17 to our society. It has already formed a sort of moral pollution. The 18 teachers and parents need more powerful support in their protection of the young generation. At the same time the young 19 need more interesting books to help them 20 those ugly papers. | ||||
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