由于领导活动是一种具有高度综合性的实践活动，而且每个领导者应该是通才型人才，这就需要领导者科学的研究要以社会实践中的各方面知识和多种相关学科的理论为基础。
这一段话主要支持的观点是（）。
A．领导活动是一种高度综合性的实践活动，需要在实际工作中逐步摸索出一套行之有效的方法
B．要研究领导科学，须具备与领导活动有关的理论知识
C．对领导科学的研究，不能使理论与实践相脱离
D．对领导科学的研究，实践活动远远大于理论研究
参考答案：C
Electronic (电子的) books, or e-books, have changed the way many of us read. Now, electronic textbooks are changing the way many students 1 . Many schools in Washington have begun using online course materials for their students. Rather than using a regular textbook, it’s all online. “Our students are ready to use resources (资源) from different 2 ,” said the head teacher, Peter Noonan. He talked about the 3 of electronic textbooks to a reporter. “The world is changing 4 . Online textbooks can change right along with the things that are happening. Besides, electronic textbooks 5 less than regular textbooks. We need to pay $8 million for the regular textbooks for our students, but we only need to spend $6 million 6 the electronic textbooks,” said Peter Noonan. Students have different ideas about the change, 7 most like it. “I don’t have to carry a textbook around, so that is 8 ,” said a high school student named Melanie Reuter. Maria didn’t 9 . “I don’t like it because the Internet sometimes doesn’t work.” Some students don’t have a computer or can’t go online at home. Stephen is 10 of them. But he said, “I can go to the library, or go to a friend’s house, to go online.”
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