题目

Aunt Wang is not here now．She has _______to Shanghai and will stay there for several months． A．got            B．come                 C．been               D．gone 答案：D如图所示，∠AOB=41°，点P为∠AOB内的一点，分别作出P点关于OA，OB的对称点，，连接交OA于M，交OB于N，，则△PMN的周长为_________，∠MPN________°.