调速系统中采用比例积分调节器,兼顾了实现无静差和快速性的要求,解决了静态和动态对放大倍率数要求的矛盾。
参考答案:对
PC机目前使用的大多数显示卡与VGA兼容,VGA标准的分辨率是______,帧频是60Hz,每个像素有256种颜色可选。
短文改错
It was my 18th birthday yesterday. As the age is special for our teenagers, so my parents held a birthday party for me at home. With my parents and some of my good friends attend my birthday party, I really had unforgettable experience. We sang songs, dancing and played games together. We all enjoyed ourselves very much. During the party, my parent told me that from then on I was no longer a child and an adult. They also said I should be more independent and responsibly. Hearing their words, I was greatly encouraged. It was just in that moment when I felt I was a grown-up