2. 计算机
  3. In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet. Microwave com

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet. Microwave com

admin2010-01-24  62
问题 In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
   Microwave communication uses(66)-frequency radio waves that travel in straightline sthrough the air. Because the waves cannot(67)with the curvature of the earth, they can be(68)only over short distance. Thus, microwave is a good(69)for sending data between buildings in a city or on a large college campus. For longer distances, the waves must be relayed by means of" dishes" or(70). These can be installed on towers, highbuildings, and mountain tops.
选项 A、material
B、equipment
C、medium
D、channel
答案C
解析
转载请注明原文地址:https://www.kaotiyun.com/show/pGJZ777K
本试题收录于： 网络工程师上午基础知识考试题库软考中级分类
0

网络工程师上午基础知识考试

软考中级

相关试题推荐
随机试题
最新回复(0)