Fill in the blanks withe the proper forms of the words in the brackets. T he USA, especially its northeast, is known as the “melting pot,” the ______ ( fuse ) of people from many countries into American .
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【简答题】一定量的理想气体,从 A 态出发,经 p ― V 图中所示的过程到达 B 态,则在这过程中,该气体吸收的热量为 。(取二位有效数字)