肖特基二极管其工作电流可达几千安，而反向恢复时间可短至几纳秒。
查看答案
快恢复二极管反向击穿电压可达几千伏、反向恢复时间一般为几百纳秒。
A. 对
B. 错
Which of the following statements is TRUE about the British media?
A. They supply people with news, keeping them informed of what is happening in the world.
B. They are mainly interested in making huge profits by publishing advertisements.
C. They help little to shape British culture.
D. They provide no side effect.
Which of the following about the BBC is TRUE?
A. There is no advertising on any of the BBC programmes.
B. The BBC is funded by license fees paid by the government.
C. The BBC has four channels.
D. The BBC have caused severe cultural conflicts in the world.
The tabloids cover the following content EXCEPT?
A. Sports stars.
B. Gossip.
C. Junk food news.
D. Voting.
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