单选题If separating effect is not good, which measure should be taken （）Aworking at intervals and properly heatingBwarming up to 70℃, increase water supply flowCimproving impulse of water supplyDreducing water supply flow
单选题
If separating effect is not good, which measure should be taken （）
A
working at intervals and properly heating
B
warming up to 70℃, increase water supply flow
C
improving impulse of water supply
D
reducing water supply flow
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