完形填空
(1) is an American girl. (2) name is Helen. And this is Mike. (3) is an English boy. Mike can (4) his name. Kate can sing ABC song. Mike's home phone number is 658-4323. He can (5) Kate at 954-3643. They (6) friends now.
如图,已知在矩形ABCD中,AB=4,BC=2,点M,E在AD上,点F在边AB上,并且DM=1,现将△AEF沿着直线EF折叠,使点A落在边CD上的点P处,则当PB+PM的和最小时,ME的长度为( )
250734≈____ 805200≈____ 1400036≈____