首页/ 题库 / [单选题]用晶体振荡器来锁定伴音中频频率,其原因是的答案

用晶体振荡器来锁定伴音中频频率,其原因是( )。

单选题
2021-09-01 20:11
A、晶振频谱纯净
B、晶振频率稳定度高
C、伴音中频频率稳定度高
D、伴音中频频率幅度小
查看答案

正确答案
B

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.

指令ORS功能,可实现多个指令块的“与”运算。
用晶体振荡器来锁定伴音中频频率,其原因是( )。
Logistic回归系数与优势比OR的关系为()。
电视频道调制器如果采用中频调制方式制作,其中频率为38MHZ,则伴音中频就应该取()MHZ。
多制式录像机中,不同制式电视信号的第二伴音中频频率是不同的,(例如有的是6.5MHz,6MHz和5.5MHz),如果设置一个频率为()的晶体振荡器,使其振荡信号与6.5MHz或5.5MHz的伴音中频载波信号进行混频,就可以将他们都变成6MHz的伴音中频信号。
一项关于吸烟与肺癌关系的病例对照研究,研究结果表明OR为4.0,其意义是()
()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.
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)
在Transact-SQL语句的WHERE子句中,完全可以用IN子查询来代替OR逻辑表达式。
中频信号包括图象和伴音中频,则图象中频的频率应是()
翻译:With Average or With Particular Average(WA or WPA)()
模拟数据也可以用数字信号来表示。对于声音数据来说,完成将模拟数据转换为数字信号的设施为()。
()shall be liable for loss of and damage to the Vessel and/or goods arising or resulting from inaccuracies in stating the description,quantity,weight,measurement or contents.
广告位招租WX:84302438

免费的网站请分享给朋友吧