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【单选题】
板框式压滤机的滤室主要由什么组成?A.
滤板
B.
滤框
C.
压紧板、止推板、滤板、滤框
D.
由滤板、滤框交替叠合组成
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举一反三
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A.
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schoolmate
C.
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D.
charity
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A.
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A.
got on
B.
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got off
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got out of
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