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【单选题】
对热水供热系统的集中供热调节的方法主要有（）
A.
质调节、量调节、综合调节。
B.
质调节、局部调节、集中调节。
C.
集中调节、局部调节、从和调节。
D.
质调节、分阶段改变流量的质调节、间歇调节。
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