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【单选题】
对一化学反应,若知其 △ C p ,m = ∑ v B C p , m, B > 0 ,则 ( )A.
△ H 不随温度改变而改变
B.
△ H 随温度的变化没有规律
C.
△ H 随温度升高而增大
D.
△ H 随温度升高而减少
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反馈参考答案：
举一反三
【简答题】Before we could officially start our play, we would always decide on various important details.
【判断题】According to the teacher, we should practice to the very last minute before we start our presentation.
A.
正确
B.
错误
【单选题】Before we start our discussion, I'd like to ________ some extra materials containing background information.
A.
hand around
B.
hand out
【单选题】听力原文：M I Before we start the factory visit, let me give you a few figures about Lifestyle. Foods, about the speciality bread market and about our business in that market. Basically, the UK speciality ...
A.
15%
B.
50%
C.
65%
【单选题】听力原文：Welcome to Yellowstone National Park. Before we start our nature walk today, I'd like to give you a brief introduction to our National Park Service. The National Park Service began in the late 18...
A.
A visitor to the park.
B.
A clerk of the Park Service.
C.
A guide from the touring party.
【单选题】The professor asked us to hand in an _________ before we start to write our term paper.
A.
outlet
B.
outline
C.
outlook
D.
output
【单选题】当混凝土拌合物流动性大于设计要求时,应采用的调整方法为( )。
A.
保持水灰比不变,减少水泥浆量
B.
保持砂率不变,增加砂石用量
C.
减少用水量
D.
混凝土拌合物流动性越大越好,故不需调整
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【简答题】Before we could officially start our play, we would always decide on various important details.
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