如图,在直角三角形ABC中,∠C=90°,AB=10,AC=8,点E、F分别为AC和AB的中点,则EF=( )
在汉语中,一个“吃”字意思繁多,下列对“吃”字的解释不准确的一项是( )
(____)He wants to play baseball.
(____)Tim was so happy because he got a gift.
(____)Why are you wearing a Tshirt?
(____)I am going to the cinema tomorrow.
(____)It's difficult to fly a kite.
有一个数列:4、7、10、13、…、25,这个数列共有多少项?