A. B. C. D.

为了解某校高三学生的视力情况，随机地抽查了该校100名高三学生的视力情况，得到频率分布直方图如下图，由于不慎将部分数据丢失，但知道前4组的频数成等比数列，后6组的频数成等差数列，设最大频率为a，视力在4.6到5.0之间的学生数为b，则a，b的值分别为   (　 　)

阅读下面材料，在空白处填入适当的内容或括号内单词的正确形式。

    When I was young, my parents and I ____(move) to New York from China. Although we now live in the US, we follow the customs and ____ (tradition) of China. I have learned to speak several languages, English ____ (include). I eat all kinds of foods and celebrate different holidays ____ have something to do with culture.

    However, there ____(be) many disadvantages of being part of two cultures. Sometimes, speaking a language at home ____ speaking another language in school can get confusing. Sometimes, I have trouble ____ (express) my thoughts in English because they don't understand me well. Sometimes, my culture does make me feel far away from others because I feel too ____ (difference).

    I am closer to the culture of China than that of the US. I don't listen to English music as ____(frequent) as I listen to Chinese music. Therefore, I feel very far away ____ my friends when I don't know what song they talking about.