皮皮学，免费搜题
登录
搜题
【单选题】
某同学做了一个新年贺卡动画,时间轴如下图。在播放的过程中,背景一瞬间就消失了。出现这种现象的原因是 ( ) prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>A.
背景层被隐藏了
B.
背景层的最后一帧没插入帧或
C.
多个图层叠加，挡住了背景层
D.
背景层被锁定了
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】现代计算机采用( )作为主要器件。
【判断题】It is very difficult, or even impossible, for a man to give a right answer when a woman asks him how she looks.
A.
正确
B.
错误
【单选题】How to maintain a good marriage?
A.
A man and a woman should follow every of their own impulse respectively.
B.
A good marriage takes some level of compromise between the husband and the wife.
C.
A mall and a woman should both have to endure dreadful self-sacrifice of the soul.
D.
A man and a woman should stop growing or changing.
【单选题】How to maintain a good marriage?
A.
A man and a woman should follow every of their own impulse respectively.
B.
A good marriage takes some level of compromise between the husband and the wife.
C.
A man and a woman should both have to endure dreadful serf-sacrifice of the soul.
D.
A man and a woman should stop growing or changing.
相关题目：