问题
单项选择题
下列哪一类的大肠埃希菌中含有O157:H7这一血清型（）
A.ETEC
B.EPEC
C.EIEC
D.EHEC
E.EaggEC
答案
参考答案：D
解析：肠出血性大肠埃希菌（EHEC）中的O157：H7可引起出血性大肠炎和溶血性尿毒综合征（HUS）。
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下列哪一类的大肠埃希菌中含有O157:H7这一血清型（）
A.ETEC
B.EPEC
C.EIEC
D.EHEC
E.EaggEC
参考答案：D
解析：肠出血性大肠埃希菌（EHEC）中的O157：H7可引起出血性大肠炎和溶血性尿毒综合征（HUS）。
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| Learning experiences happen to us throughout our lives. Not long ago, I had one that I would like to 1 . I was going to Marblehead with my sailboat team. The team was racing down the highway at 85 mph 2 we realized we were 3 . Luckily, we saw a rest area ahead. I had a brand new $20 bill. I was so 4 because I had never had that kind of cash before. But spending it on 5 seemed like throwing it away. We all rushed into the pizza line. 6 I got a pizza and a drink, and walked to my table. About half way through the meal, I 7 I had not actually handed any money to the cashier. I had just 8 out, and nobody had noticed, I felt terrible. My conscience (良心) opened its mouth and swallowed me in one big bite. I couldn't 9 over it. I just could n't go back to the cashier and 10 for my stolen pizza. I was so upset that I 11 to give myself the pleasure of an ice-cream for 12 that someone would say, "Hey, Jeff, why don't you use the change 13 the pizza instead of that nice, new $20 bill?" I was not so 14 of my cash now. For the next two years, whenever I was 15 of the "pizza incident", I would say to myself, "Don't think about it..." I have learned two things from this 16 . Maybe I was a fool for 17 in to my conscience, and being too stupid to appreciate a 18 pizza. But the real lesson is that even if you get away from what you have done, your conscience 19 up with you. This reflect the saying, "A coward (懦夫) dies a thousand deaths; a hero dies one." I was a coward and have felt terrible about that incident at least a thousand times. If I had been a " 20 " and gone back to pay for the pizza, I would have felt a little uncomfortable about it only once, or maybe twice. | ||||
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