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【简答题】
Which opener (or ending ) does each of the following speeches use? When I was a kid, the disaster we worried about most was a nuclear war. That's why we had a barrel like this down in our basement, filled with cans of food and water. When the nuclear attack came, we were supposed to go downstairs, hunker down, and eat out of that barrel.
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举一反三
【简答题】P 型半导体中的多数载流子是 ,少数载流子是 ; N 型半导体中的多数载流子是 ,其中离子带 电。
【简答题】在N型半导体中,多数载流子是( )。在P型半导体中,主要靠其多数载流子( )导电。
【简答题】半导体中存在着两类载流子,其中带正电的载流子叫作____ 。N型半导体中多数载流子是 ____ ,P型半导体中多数载流子是____ 。
【简答题】recording 1(20190601R1)
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