问题
单项选择题
在无线电技术中，通常把放大器分为A、B、C、D等类别，这种分类是依据（）
A.放大器件的工作点所处的范围
B.放大器件的质量等级
C.放大器件的最高工作频率
D.放大器件的最大输出功率
答案
参考答案：A
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在无线电技术中，通常把放大器分为A、B、C、D等类别，这种分类是依据（）
A.放大器件的工作点所处的范围
B.放大器件的质量等级
C.放大器件的最高工作频率
D.放大器件的最大输出功率
参考答案：A
| 根据短文内容，判断正(T)误(F)。 | |
park, he met a big fat dog. He was very afraid (害怕) of the dog. So he rode his bike away. However, his bike broke. He had to take a bus home. When he got home, he was very hungry. He ate some noodles (面条) and drank a cup of milk. He broke the cup just after drinking the milk. So, he had to clean the floor. When he was cleaning the floor, his grandma came. He was very happy to see his grandma. His grandma cooked him a very delicious dinner. After dinner, they took a long walk in the park. They saw a snake there and ran away at once. When they went back home, they were very tired (疲倦的). ( ) 1. The little cat went to the park by bike on a cloudy morning. ( ) 2. He met a big fat dog in the park. ( ) 3. The little cat went home on foot. ( ) 4. He ate noodles and drank milk because he was hungry. ( ) 5. They saw a tiger in the park after dinner and they ran away at once. |