广播是通过话筒把声音信号转换成_1，又加载到高频电磁波上，再通过_2发射到空中，由收音机接收还原成声音．_刷题宝

题干

广播是通过话筒把声音信号转换成 ____，又加载到高频电磁波上，再通过 ____发射到空中，由收音机接收还原成声音．

上一题下一题 0.0难度选择题更新时间:2019-07-22 10:41:01

答案(点此获取答案解析）

电信号,天线

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下列各组离子在溶液中,一定能大量共存，并形成无色透明溶液的是（）

同类题2

在加热条件下，向装有10gCuO的硬质玻璃管中通入H₂一段时间，最终玻璃管中剩余固体8.4g．则下列说法正确的是（）

同类题3

阅读理解。

House For Sale (房屋出售)

Red Rose Garden，Pudong

3-storey home，509 sqm total land area，428.8 sqm built-in, 312.9 sqm garden.

Asking RMB13 million (USDl.57 million).

MP: 13761973547 Tel: 021—58609228Fax: 021—58609728

Job Wanted

Cherry, 24, a shining girl, good at oral(口头的) English and putonghua. Now I am working at an international trade (国际贸易) company in Guangzhou. I am kind-hearted, hard-working and healthy, and would like part-time weekend work, teaching putonghua lessons to foreign friends. If you are interested, please e-mail me at cherryif@hotmail.com.

Price: 18 yuan (ticket), 50 yuan／hour on weekdays and 70 yuan／hour at weekends, 120 yuan／four hours on weekdays and 190 yuan／four hours at weekends.

Tel: 010—69191617

同类题4

—You have to believe in yourself. No one else will, if you don't.

— _______. Confidence is really important.

同类题5

-- Jack, I haven't seen your uncle for a long time.

-- He _____ Shanghai on business for two mouths.

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