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【单选题】
为提高重力沉降室的捕集效率,下面说法不正确的是( )A.
增加沉降室内的气流速度
B.
增加沉降室的长度
C.
降低沉降室的高度
D.
降低沉降室内的气流速度
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【简答题】Each time I see a balloon, my mind flies back to a memory of when I was a six-year-old girl. It was a rainy Sunday and my father had recently died. I asked my mom if Dad had gone to heaven. “Yes, hone...
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