单项选择题

电磁波在均匀无限大媒质中传播时,波阻抗等于媒质的本质阻抗。
A、正确
B、错误

题目列表

你可能感兴趣的试题

问答题

The following questions are designed to introduce you to the concept of critical reading. Complete the diagnostic pretest to see whether you are a critical reader.
                                                   How do I read?                                                                Yes      No
1.I tend to read very little beyond what is actually required to pass.
2.I concentrate on memorizing a good deal of what I read. 
3.I try to relate ideas I come across in other topics to what I read. 
4.When I read an article or book, I try to find out exactly what the author means.
5.Often I find myself questioning what I read.
6.When I read, I concentrate on learning just those bits of information I need to pass.
7.When I am reading, I stop from time to time to reflect on what I am trying to learn 
8.When I read, I examine the details carefully to see how they fit in with what’s being said.
9.I like books which challenge me and provide explanations which go beyond lectures.
10.I like books which give definite facts and information which can be learned easily.
11.I read an article straight through from start to finish.
12.I note down all the facts and figures.
13.I note the author’s main arguments.
14.I think about whether the facts support these arguments.
15.I make summary notes to use later.
Score: _____________

答案: Scoring: question 1,2,6,10,11,12,15—for every “yes” give you...
微信扫码免费搜题