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【单选题】
规定体系吸热，Q > 0 ；体系对环境做功，W < 0 。封闭体系经历一循环过程, 则下列各式或量一定为0的是（ ）。A.
Q
B.
W
C.
Q-W
D.
Q+W
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【简答题】The National Gallery Description: The National Gallery is the British national art museum built on the north side of Trafalgar Square in London. It houses a diverse collection of more than 2,300 examp...
【单选题】Why is Yellowstone National Park important?( )
A.
Because it is the first national park in the world.
B.
Because it is in America.
C.
Because it is the biggest national park in America.
D.
Because it is the first national park in America.
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【简答题】国际民用航空组织的简称是 。
【单选题】The sentenc e “ _____ ” does not belong to the T en Commandments .
A.
Thou shalt not kill
B.
Neither shalt thou commit adultery
C.
Neither shalt thou steal
D.
Ne ith er shalt thou lie
【简答题】The National Gallery Description： The National Gallery is the British national art museum built on the north side of Trafalgar Square in London.It houses a diverse collection of more than 2,300 exampl...
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