A:to watch
B:to be watched
C:watching
D:being watched
设方程10﹣x=|lgx|的两根为x1,x2,则( )
“两弹一星”的成功发射、三峡工程、南水北调、西气东送、抗洪、抗“非典”的胜利、“神六”升空……这些例子都证明了( )