题目内容
.如图,CD⊥OB于D,EF⊥OA于F,则C到OB的距离是______,E到OA的距离是______,O到CD的距离是______,O到EF的距离是______.
如图,CD⊥OB于D,EF⊥OA于F,则有C到OB的距离是________,E到OA的距离是________,O到CD的距离________,O到EF的距离是________.