A:persuading
B:to be persuaded
C:to persuade
D:persuading
给下面句子排序。(用数字表示)
①It's a knife.
②What's this in English?
③Excuse me, Wang Bing.
④Thank you.
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X、Y、Z均由短周期元素组成的中学常见物质,存在如下转化关系:XYZ,下列说法错误的是( )
如图,在四边形ABCD中,AB=AD,CB=CD,点E在AC上,则图中全等三角形共有