This radar relay(中继站), as it has come to be called, is described in some detail in Chap. 17.
举一反三
- She is sure to come unless she has some urgent business.
- She described the ancient city in detail because she(live)_________there for years.
- 数字微波中继站的中继方式有几种？
- Emma, come here. Here ______ some new pens for you. A: is B: are C: has D: have
- 【单选题】微波信号需要中继才能实现远距离传输,以下________不能用于微波中继。 A. 地面中继站 B. 大气电离层 C. 卫星中继站 D. 大气对流层