问题
单项选择题 A1/A2型题
广泛用于立克次体血清学诊断及立克次体种别鉴定的方法是（）
A.DFA
B.IFA
C.ELISA
D.MA
E.IHA
答案
参考答案：B
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广泛用于立克次体血清学诊断及立克次体种别鉴定的方法是（）
A.DFA
B.IFA
C.ELISA
D.MA
E.IHA
参考答案：B
Some people have very good memories(记忆力) and can easily learn quite long poem（诗歌） by heart. Some people have 1 memories and can only remember things that they have said again and again. The 2 English writer Charles Dickens said that he could walk down 3 street in London and then tell you the name of every shop on 4 sides of the street. Great men in the world have wonderful memories. A good memory is a great help in learning a language. Everybody learns 5 own language by remembering what he hears when he is a small child. Some children live with their parents in foreign（外国的） countries and they seem 6 two languages as easily as one. At school it is not so easy to learn foreign languages 7 students have little time for it and they are busy with other subjects as well. A man's mind is quite like a camera but it 8 photos of what we see and it can also take photos of what we feel, hear, smell and taste. When we take a real photo with a camera, there is much work 9 before the photo is finished and ready to show to our friends. 10 the same way there is much work to do before we can keep a picture forever（永远）in our mind.
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