When a sudden increase in steam demand comes to normal, the drum pressure will and water level in the drum will（）.<br>A:rise, rise also<br>B:rise, drop<br>C:drop, rise<br>D:drop, drop also

When a sudden increase in steam demand comes to normal, the drum pressure will and water level in the drum will（）.
A:rise, rise also
B:rise, drop
C:drop, rise
D:drop, drop also

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