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【简答题】
数据管理技术的发展依次经历了人工处理阶段、文件系统阶段、____阶段、分布式数据库系统阶段等。
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反馈参考答案：
举一反三
【简答题】Although science has made enormous 1 in food more fit to eat, it has,
【单选题】Professor Taylor's talk has indicated that science has a very strong ______ on the everyday life of non-scientists as well as scientists.
A.
motivation
B.
perspective
C.
impression
D.
impact
【多选题】要提高 PVC 的热稳定性,可采用下列哪些措施? ( )
A.
通过合成工艺的改善来减少分子链中的不稳定结构
B.
把不同型号的 PVC 混合使用
C.
加入热稳定剂
D.
与其他材料复合
E.
以上均可采用
【单选题】John Horgan ______ . Ⅰ. has published a book entitled The End of Science Ⅱ. has been working as an editor of Scientific American Ⅲ. has been working many years as a literary critic Ⅳ. is working as a ...
A.
Ⅰand Ⅱ
B.
Ⅰonly
C.
Ⅰand Ⅳ
D.
Ⅰ,Ⅱand Ⅳ
【单选题】Now science has reached the stage of ( ) .
A.
empirical science
B.
theoretical science
C.
computational science
D.
data science
【单选题】John Horgan______. Ⅰ. has published a book entitled The End of Science Ⅱ. has been working as an editor of Scientific American Ⅲ. has been working many years as a literary critic Ⅳ. is working as a sc...
A.
Ⅰ and Ⅱ
B.
Ⅰ
C.
Ⅰ and Ⅳ
D.
Ⅰ, Ⅱ and Ⅳ
【多选题】要提高PVC的热稳定性，可采用下列哪些措施（）。
A.
通过合成工艺的改善来减少分子链中的不稳定结构
B.
把不同型号的PVC混合使用
C.
加入热稳定剂
D.
与其他材料复合
【单选题】How has science done a disservice to mankind?
A.
Because of science, most of the foods we eat today are contaminated.
B.
It has caused a lack of information concerning the value of food.
C.
As a result of scientific intervention, some potentially harmful substances have been added to our food.
D.
The scientists have preserved the color of meats, but not of vegetables.
【判断题】Hatred is the very feeling the author has about what science has done to food. ()
A.
正确
B.
错误
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