信息科学的概念首先于1959年被美国宾夕法尼亚大学莫尔电子工程学院应用，这一概念既包 发布时间：2017-05-01 21:01 │ 来源：www.tikuol.com 题型：填空题 问题： 信息科学的概念首先于1959年被美国宾夕法尼亚大学莫尔电子工程学院应用，这一概念既包括信息理论又包括（）。
题型：填空题 从方框中选择适当的句子完成对话A. Do you have breakfast at home or at school? B. When do you get up? C. Why? D. What's your favourite school day? E. Why do you get up so late?Linda and Jack are talking about their school day. Linda: Jack, (1)______________Jack: It's Tuesday. Linda: (2)______________Jack: Because we have English and music on Tuesday. They are my favourite lessons.Linda: (3)______________Jack: At six o'clock on Tuesday and at half past six on other days. Linda: You get up early. I get up at seven. Jack: (4)______________Linda: My school is next to my house. Jack: Oh. (5)______________Linda: At home. But I have lunch at school. Jack: Me too. I like school lunch. The food is good. 查看答案
题型：填空题 取维生素A滴剂0.1186g(50 000IU/g),加环己烷至50.0ml,精密量取2ml 置于另一25ml量瓶中，加环己烷至刻度，摇匀后置石英比色皿，以环己烷为空白，分别于下列波长处测得吸收度，试求此滴剂中维生素A的标示量%（10分）波长(nm)300 316 328340 360吸收度 0.300 0.503 0.5650.472 0.185附：规定比值Al/A328nm 0.555 0.907 1.0000.811 0.299校正公式A(校正后)=3.52(2A328-A316-A340)效价:2.907×106IU/g;E1%1cm(328nm环己烷)=1530 查看答案