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  1. ... the cold night comes and the water freezes into ice and expands, thus widening the crack... a patch of rock fragments beside the upper half of a river. The river flows quickly. ...

    分類:科學及數學 > 化學 2009年06月08日

  2. ... refrigerator) or a freezing compartment only (a freezer ) or contain both. The industry has nicknames...auto-refrigeration of a portion of the liquid (typically, less than half of the liquid flashes). The cold and partially...

    分類:科學及數學 > 化學 2007年06月08日