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【判断题】
凡速率方程式中各物质浓度的指数等于反应方程式中其化学式前的系数时,此反应必为基元反应A.
正确
B.
错误
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皮皮学刷刷变学霸
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【单选题】听力原文： If you've been on campus for very long, I'm certain that you've already heard about this course. You may know that last semester about 50 percent of the students enrolled in my course failed it....
A.
10 points.
B.
2 points.
C.
15 points.
D.
5 points.
【单选题】听力原文： If you've been on campus for very long, I'm certain that you've already heard about this course. You may know that last semester about fifty percent, of the Students enrolled in my course failed...
A.
10 points.
B.
2 points.
C.
15 points:
D.
5 points.
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