【简答题】时间码用来识别和记录视频数据流中的( ),从一段视频的起始帧到终止帧,每一帧都有一个唯一的时间码,从而方便对视频进行定位和编辑。其格式为:小时:分钟:秒:帧。
【简答题】____和环境的教育性是幼儿园环境的特点。
【简答题】时间码的记录方式有__________和___________两种。
【单选题】— I think riding a bike anywhere is healthy and convenient, but I'm afraid the bike would be stolen. — ______________ .
A.
Why don't you take a lock with you?
B.
Then don't ride a bike at all.
C.
Bikes are easy to be stolen.
【单选题】---Cliff, I lost your bike at school. I suppose I should pay for it. ---Oh, ______. It was an old bike anyway.
【单选题】洗衣机、电冰箱等家用电器的金属外壳应连接()。
【判断题】幼儿园环境的特点是 环境的教育性和可控性。