【多选题】以下关于视频转场特效描述正确的是?
A.
当把一个新的视频转场特效添加到一个已有的视频转场特效上后,新的视频转场特效将替换原有的视频转场特效
C.
结束于切点在视频轨道上选中转场特效,拖动其边缘即可调整视频转场特效持续时间
D.
当把一个新的视频转场特效添加到一个已有的视频转场特效上后,两个转场效果将并存,共同影响视频效果
【判断题】设 ,而 , ,求 和 。 解:根据复合函数求偏导法则得 解答是否正确?
【单选题】导游服务的 特点要求导游人员有高度的责任感和敬业精神,以及较强的心理自控能力。
【简答题】选词填空 1.on sale ,2. afford , 3.are worth , 4.In fact , 5.spends, 6.as well as, 7. accept , 8.at your service , 9.order, 10.took part in , 11.credit card , 12.stop it from spreading , 13.consider, 14....
【简答题】A组阅读 The first calender.docx 根据句子意思,用文中单词填写句子。 1. I like to make notes of important s on my ______. 2. Si Maqian is a well-known _______ in ancient Chinese history. 3. The student tries all his b...
【单选题】设 ,求z对 的导数,解法正确的是( )
D.
视 为 的函数,在方程组两边对 求导,得 ,故解出
【简答题】It is well known that computers are becoming more and more popular. They are playing an important 1 in our daily lives. Computers are very 2 in almost every field. The first 3 of computer is to edit f...