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【单选题】
再热机组在各级回热分配上，一般采用增大高压缸排汽的抽汽量，降低再热后第一级回热的抽汽量是为了（ ）。A.
减少给水加热过程的不可逆损失
B.
尽量利用高压缸排汽进行加热
C.
保证再热后各加热器安全
D.
增加再热器后各级回热抽汽的抽汽作功量
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