【单选题】系统进行频率调整可以分为一次积二次调整,其中可以实现无差调节的是()
【判断题】频率的一次调整和二次调整都可以实现无差调节。
【单选题】If I had one million dollars, I’d donate it to _______ /′med?k?l/ research.
【单选题】中国药典规定,原料药含量未规定上限时,不能超过()
【单选题】If I had one million dollars,I would________it to the charity. [ ]