The flood last month in the east was a real disaster，________19 people dead and 78 missing.
—Isn't it in your bag? I saw you ____ it in your bag.
—Oh, here it is. Thank you.
爱迪生为发明蓄电池做实验，虽然失败25000多次，但始终充满必胜的信心，最后终于成功。这一事例告诉我们（ ）
