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【单选题】
注水时，用（）控制高压加热器水侧压力上升≤0.5MPa/min。
A.
进水门
B.
勺管开度
C.
注水一次门
D.
注水二次门
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参考答案：
参考解析：
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【单选题】Most shoppers know the feeling. You stand in front of piles of organic produce and wonder what those premium prices are buying you over and above what you get from standard foods. Not a lot nutrition-...
A.
do not use naturally produced fertilisers
B.
produce carbon dioxide when removing weeds
C.
use high doses of weed-killer
D.
use too many resources to qualify for organic status