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【单选题】
某泄水底孔平面事故闸门，上游设计水头30m，下游设计水头4m，从底槛到顶止水的距离为8m，两侧止水间距为6.0m，闸门在设计水头挡水时的静水压力为( )kN。A.
12480
B.
12000
C.
11480
D.
480
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【单选题】I can't imagin_my life will look like without my mobile phone.
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B.
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C.
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D.
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