小明端着盆泼水时，盆留在手中，水却泼了出去，请你解释这个现象．

    Today I'd like to tell you a little about the people I admire the most.

    My first hero is the adventure Jessica Watson. In October 2009, when she was only sixteen years old, Jessica left Sydeney, Australia and sailed ____the Pacific, Atlantic and India Oceans all by herself. She ____to Sydney in May 2010. She is the youngest person to sail solo unsupported around the world. I have a lot of respect for her as she was ____to face difficulties and danger alone. Australians were so ____her that they called her "our newest Australian hero."

某校初三年级组织一次篮球比赛，每两班之间都赛一场，共进行了55场比赛，则该校初三年级共有____个班．