NTSC制式电视的帧速是()。
参考答案:30帧/秒
--Have you cleaned out the refrigerator _______?
---Yes, I have done it ________. But I haven’t taken out the rubbish ________.
A.yet, yet, yet
B.already, already, already
C.already, yet, already
D.yet, already, yet
公安机关处理交通事故的程序你知道吗?