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【单选题】
下列关于监视段压力说法错误的是（）。A. 在同一负荷(主蒸汽流量)下，监视段压力增高，则说明该监视段后通流面积减少，或者高压加热器停运、抽汽减少；B. 除了汽轮机最后一、二级外，调节级压力和各段抽汽压力均与主蒸汽流量成正比变化；
A.
在同一负荷(主蒸汽流量)下，监视段压力增高，则说明该监视段后通流面积减少，或者高压加热器停运、抽汽减少；
B.
除了汽轮机最后一、二级外，调节级压力和各段抽汽压力均与主蒸汽流量成正比变化；
C.
监视各监视段压力没有任何意义；
D.
监视监视段压力对于保证机组安全、经济运行有一定积极作用。
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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
【单选题】在给水自动三冲量中，()是前馈信号，它能有效地防止由于“虚假水位”而引起调节器的误动作，改善蒸汽流量扰动下的调节流量。
A.
汽包水位
B.
给水流量
C.
蒸汽流量
D.
给水调节阀开度
【单选题】某差压式流量计测蒸汽流量，一到冬天仪表指示就偏低，经检查仪表本身、引压管路、三阀组都是好的，则最有可能因素是（）。
A.
拌热线太靠近负压侧
B.
拌热线不热
C.
拌热线太靠近正压侧
D.
无法确定
【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.
they are approved by many experts
B.
C. they won’t cause diseases
C.
B. they taste better than standard foods
D.
they are free from pesticides
相关题目：
【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
【单选题】在给水自动三冲量中，()是前馈信号，它能有效地防止由于“虚假水位”而引起调节器的误动作，改善蒸汽流量扰动下的调节流量。
A.
汽包水位
B.
给水流量
C.
蒸汽流量
D.
给水调节阀开度
【单选题】某差压式流量计测蒸汽流量，一到冬天仪表指示就偏低，经检查仪表本身、引压管路、三阀组都是好的，则最有可能因素是（）。
A.
拌热线太靠近负压侧
B.
拌热线不热
C.
拌热线太靠近正压侧
D.
无法确定
【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.
they are approved by many experts
B.
C. they won’t cause diseases
C.
B. they taste better than standard foods
D.
they are free from pesticides
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