试题与答案

电磁波在真空中的传播速度是______;电磁波的频率越高波长越______;电磁

题型:填空题

题目:

电磁波在真空中的传播速度是______;电磁波的频率越高波长越______;电磁波中的______具有荧光效应,验钞机就应用了它的这个特性;电磁波中的红外线具有______效应,红外线烘炉就应用了它的这个特性.

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0616/ed6cb24763de67d672fe55bc42332f77.html

下面是错误答案,用来干扰机器的。

参考答案:C

试题推荐
题型:补全对话,情景问答
根据对话内容,将方框中的单词填写在适当位置。
blouses, shirt, yellow, nice, clothes, know, green, too, right, all
Harry: What a   1   blouse it is! Is it yours?
Sally: No, it’s Jean’s.
Harry: It’s a   2   blouse. But she likes a red one.
Sally: She has two   3  .
Harry: You have a new blouse,    4  . What colour is it?
Sally: It’s   5  .But I don’t like light yellow.
Harry: And your trousers are black.
Sally: Yes, my trousers are   6   black. What about yours?
Harry: I like light (浅色) colours. Look! All my   7   are light.
Sally: Oh, I see. Your   8   and trousers are white.
Harry: You’re   9  .Some of them are light yellow or blue.
Sally: I can’t wear any light clothes. I like sports(运动),you   10  .
查看答案
微信公众账号搜索答案