三极管工作在饱和区时无电流放大作用,其发射结和集电结都处于正向偏置。
参考答案:对
非选择题部分(共45分)
单词拼写(共15小题,每题1分,共15分)
1. This material absorbs the sound, and doesn't r_________ it.
2. The gate is n_____________ than a car; we'll have to walk through.
3. Is this garment made of p________ wool, or of wool mixed with nylon(尼龙).
4. Hearing that the famous star was about to appear, the fans y__________ and cheered.
5. We hope to have an income of an average a_________ growth rate of 10%.
6. The escaped prisoner was _____________ (拉) out of the cave.
7. Gina's ____________ (语言) is so sharp that it will get her into trouble one day.
8. He told us some amusing _________ (轶事) of the President's childhood.
9. They had an ____________ (令人敬畏的) task ahead.
10. Human brains contain more than 100 million __________ (细胞) per cubic (立方) centimeter.
《水土保特法》规定,在()度以上坡地植树造林,应当采取水土保持措施。
A.3
B.5
C.10
D.15