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【多选题】
以下各种元件中,拥有自己的时间轴、舞台和层的元件是:A.
图形元件（ Graphic ）
B.
电影剪辑（ Movie Clip ）
C.
按钮元件（ Button ）
D.
字体元件（ Font ）
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举一反三
【单选题】The first law of thermodynamics states ΔU=Q+W, where
A.
W >0 when work is done by surroundings.
B.
W >0 when work is done by system.
C.
W <0 when work is done by surroundings.
D.
Q >0 when heat is gained by surroundings.
E.
Q <0 when beat is gained by system.
【简答题】翻译 1. There is a mix of confrontation and cooperation between them. 2. He died, and was survived by wife and three children. 3. Law enforcement cannot responsibly stand aloof. 4. Evidently he had the ...
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