题目

To Whom It May Concern:Your address was forwarded to us by Why Bother Magazine. All of us here think The International Institute Not Doing Much is the best organization in the world. You know how to avoid unnecessary activities! We closely followed the advice in your article. First, we replaced all our telephones with carrier pigeons. Simply removing the jingle of telephones and replacing them with the pleasant sounds of birds has had a remarkable effect on everyone. Besides, birds are cheaper than telephone service. After all, we are a business. We have to think of the bottom line. As a side 写出下列命题的逆命题，并判断逆命题的真假．（1）有两边上的高相等的三角形是等腰三角形；（2）三角形的中位线平行于第三边．