“对角线相等且互相垂直平分的四边形是正方形”的逆命题是( ),这个逆命题是( )命题(填“真”或“假”)。
正方形的对角线相等且互相垂直平分;真
A large number of joumalists from both home and abroad gathered in Shanghai to _____ the 2010
Shanghai World Expo.[ ]
A.interview
B. cover
C. approve
D. compete