“你最痛苦的时候,窗外的小鸟在快乐的歌唱”这句格言的哲学寓意( )。
- I called you at 8: 00 yesterday evening, but no one answered.
- Sorry. I______ clothes for my parents at that time.
命题“对顶角相等”的条件是 ____,结论是 ____