If you want to do international trade successfully, ______ of English is _______.
A:good command; a must
B:a good command; a need
C:a good command; a must
D:good command; must
如图,正方形ABCD的边长为3,点E在边AB上,且BE=1,若点P在对角线BD上移动,则PA+PE的最小值是____.
给《静夜思》划分朗读节奏。
静夜思
床前明月光,疑是地上霜。
举头望明月,低头思故乡。