问题
单项选择题
在等差频FMCW高度表中，被测高度转换为（）。
A.发射信号的锯齿波调制周期
B.调频信号的频移
C.发射信号与地面反射信号的差频频率
D.接收信号的幅度
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
在等差频FMCW高度表中，被测高度转换为（）。
A.发射信号的锯齿波调制周期
B.调频信号的频移
C.发射信号与地面反射信号的差频频率
D.接收信号的幅度
参考答案：A
| 根据文章内容完成框内短文。 Our town has a big zoo with a lot of animals in it. There are two old lions. They eat lots of meat every day. There are also two big elephants and a little one. They are very kind. They eat much grass every day. There are a lot of' monkeys in the zoo, too. Children like them and they like children too. They like children because they sometimes give them bread and bananas. They like bananas very much. In our zoo there are three black bears and four white ones. They stand on their back legs, hold up their arms and play with each other like small children .They love candy very much.
|