NBDP的FEC方式汇总，保证BRS与BSS间同步的定相信号是（）A.0.1点阵信号 发布时间：2020-01-14 23:13 │ 来源：www.tikuol.com 题型：单项选择题 问题： NBDP的FEC方式汇总，保证BRS与BSS间同步的定相信号是（）A.0.1点阵信号B.RQ，aC.RQD.a
题型：单项选择题 阅读理解。CCTV-1 18:30 Children's World 19:00 News 19:45 Around the World 20:20 Movie: A Nurse's Day 21:50 Message from the Market 22:20 Modern Arts 23:00 EndCCTV-4 18:30 Modern English 19:00 Women's Life 19:30 Culture and Life 20:45 Volleyball match: China-America 22:30 English News 22:50 English Movie: Gone with the world 00:30 EndNTTV 18:30 NTTV News 19:00 Popular Songs 19:30 Animal World 20:20 American English Today 21:15 Science and Life 22:30 Sports News 23:00 EndJSTV 18:40 English for Children 19:00 News from CCTV-1 19:30 JS News 19:45 Football Match: China- Japan 21:30 TV-play: Story of a Spanish Artist (1) (2) 23:15 End1. A football fan can enjoy a football match on _________.A. JSTV B. CCTV-1 C. NTTV D. CCTV-4 2. If you are interested in pop songs, you may choose(选择) _______________. A. CCTV-1 B. NTTV C. CCTV-4 D. JSTV 3. The English news on CCTV-4 lasts about _________ minutes (分钟). A. 20 B. 25 C. 30 D. 40 4. Which TV station has the most English programmes (节目)? A. JSTV B. NTTV C. CCTV-1 D. CCTV-4 5. Which of the following is right? A. Children can enjoy the Children's World on CCTV-4 at 18:30. B. NTTV ends at 00:30. C. You can see News on CCTV-1 and JSTV at the same time. D. NTTV has a TV play at 21:30. 查看答案
题型：单项选择题 安全电压是在一定条件下、一定时间内不危及生命安全的电压。我国标准规定的工频安全电压等级有42V、36V、24V、12V和6V(有效值)。不同的用电环境、不同种类的用电设备应选用不同的安全电压。在有触电危险的环境中所使用的手持照明灯电压不得超过（）V。A．12 B．24 C．36 D．42 查看答案