如图,在△ABC中,∠C=90°,AC=2,BC=1,则tanA的值是____ .
Don't forget thanks when other people help you.
俄罗斯的首都是( )
How fantastic the dragon boat beams were!那些龙舟队真是棒极了!
点拨:这是两个感叹句。以下为感叹句的两种句型讲解。