问题
单项选择题
在免疫散射比浊中，当颗粒直径远小于入射光波长时，称为（）
A.Rayleigh散射
B.Mie散射
C.Debye散射
D.速率散射
E.定时散射
答案
参考答案：A
解析：当入射光通过悬浮在反应溶液中的分子时，如果颗粒直径比入射光的波长小很多，则散射光的分布比较均匀，称为Rayleigh散射。
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在免疫散射比浊中，当颗粒直径远小于入射光波长时，称为（）
A.Rayleigh散射
B.Mie散射
C.Debye散射
D.速率散射
E.定时散射
参考答案：A
解析：当入射光通过悬浮在反应溶液中的分子时，如果颗粒直径比入射光的波长小很多，则散射光的分布比较均匀，称为Rayleigh散射。
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| I didn’t think I had a passion （激情）. I 1 sit in front of the TV all day, thinking about nothing 2 the next 3 .It was not long ago that I first learned how 4 having a passion is to my life. That day my mother drove me to the center of the city. Then, as my mum stopped at a red light, someone on the side of the road caught my 5 . It was a man 6 in rags. He was homeless. That didn’t 7 me, for I had seen many like him 8 . But in some way he was 9 , this man was not sitting down 10 a sad expression. He had a radio in his hand and was dancing 11 to the music. The radio seemed to be the most precious （珍贵的） thing he had. "Mum, why does that man have a radio 12 he is homeless?" I asked. " He bought it." She replied. I was still unable to 13 . " But if he is homeless, why doesn’t he use the money to buy 14 or clothes? He 15 it on something he doesn’t need." "Well, Sarah, sometimes food and clothes aren’t the most important things. We need 16 , too." That man must 17 enough about 18 instead of food and clothes. I soon realized that happiness is the key to life. Without it , there is nothing to look forward to. Since then I’ve gone a day 19 thinking of what’s truly important. A home, a meal, clothes-these things are only part of the life. What’s often forgotten is that we all need a 20 , a light in a dark day. We all need a passion. | ||||
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