首页/ 题库 / [单选题]接收机接收频率为fc,fL>fc,fI为的答案

接收机接收频率为fc,fL>fc,fI为中频频率,则镜象干扰频率为( )

单选题
2021-09-01 23:33
A、fc>fI
B、fL+fc
C、fc+3fI
D、fc+fI
查看答案

正确答案
A

试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

函数 青书学堂.png 的定义域为
函数 青书学堂.png 的定义域为
接收机接收频率为fc,fL>fc,fI为中频频率,则镜象干扰频率为( )
ACS是邻道选择性,定义为接收机滤波器在指定信道频率上的()与在相邻信道频率上的()的比值。
多普勒计程仪是应用多普勒效应进行测速和累计航程的,当超声波声源与接收者相互靠近时,接收者接收到的声波频率与声源频率相比()。
接收体或振动源如何运动可使接收频率减小(选择二项)()。
设测距机的发射频率为fo,它的接收信号频率()。
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
已知A=40;B=30;C=100;D=50,逻辑“与”运算符为and,“或”运算符为or,“非”运算符为not。计算表达式(A>B+20)or(B+60<>
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
我国调频立体声广播接收机中使用的中频频率为()
采用振弦式土压力计测定挡土结构的土压力时,其相应的接收仪为频率仪,则接收仪的读数为()。
翻译:With Average or With Particular Average(WA or WPA)()
广告位招租WX:84302438

免费的网站请分享给朋友吧