皮皮学，免费搜题
登录
搜题
【单选题】
关于模拟调制，下列说法正确的是（）A.
包络检波属于相干解调方式
B.
AM可采用相干解调法解调
C.
VSB占用带宽比SSB小
D.
AM调制效率可大于50%
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】敏捷软件开发宣言的4个价值观是:( )胜过"过程和工具",
( )胜过"面面俱到的文档",
( )胜过"合同谈判"
( )胜过"遵循计划"
【简答题】敏捷软件开发宣言的4个价值观是: ( )胜过"过程和工具"; ( )胜过"面面俱到的文档"; ( )胜过"合同谈判"; ( )胜过"遵循计划"。 a 响应变化 b 可以工作的软件 c 客户合作 d 个体和交互
【简答题】B4 Unit 2 News report 1
【简答题】会见在国际上通常安排在[ ]或[ ](填场所)。有时宾主各坐一边,有时穿插坐在一起。某些国家元首会见还有其独特的礼仪形式。
【单选题】Unit 5 Section B Task 5 Listen to the following news report about cultural differences and the law. Choose the best answer to each question. Questions 1-3 are based on the news report you’ve heard. ...
A.
That the foreigners broke Cambodian law, and must face the charges.
B.
That the incident was a cultural misunderstanding.
C.
That the accused were wearing clothing that would be considered acceptable in their home countries.
D.
That the foreigners should not have gone to a pub crawl.
【单选题】UNIT 1 PART 2 SECTION B TASK 5 Listen to the following news report about different recycling practices within the family. Choose the best answer to each question. Questions 19-21 are based on the news...
A.
2,500.
B.
5,000.
C.
2,000.
D.
1,500.
【单选题】根据下面短文内容，回答题。 Different Tastes for Vacation People like different kinds of vacations. Some go outside. Others like to stay at a hotel in an exciting city. They go shopping all day and go dancing all n...
A.
a shopping center
B.
a hotel
C.
a dancing hall
D.
a place of interest
相关题目：