如图,矩形ABCD中,点M是CD的中点,点P是AB上的一动点,若AD=1,AB=2,则PA+PB+PM的最小值是 ____.
下列词语中,没有错别字的一组是( )
用所给词的适当形式填空
(1)It's time____(play)football.
(2)We want____(visit)the San Francisco next month.
(3)What about____(go)____(swim)tomorrow?
(4)—What are you going to do tomorrow? —I____(have)a party at home.
(5)She____(be)an English teacher next year.
把一副三角板如图甲放置,其中∠ACB=∠DEC=90°,∠A=45°,∠D=30°,斜边AB=6,DC=7,,把三角板DCE绕着点C顺时针旋转15°得到△D1CE1(如图乙),此时AB与CD1交于点O,则线段AD1的长度为( )