A. Explain how present day reading habits developed. B. Change people’s attitudes to reading. C. Show how reading methods have improved. D. Encourage the growth of reading. 参考答案:C 答案解析:答案暗示可在第二段结尾句Examination of factors related to the historical development of silent reading reveals t
第29题: [单项选择]膜剂的制备多采用( ) A. 热熔法 B. 涂膜法 C. 溶剂法 D. 热压法 E. 摊涂法 参考答案:B