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【单选题】

高低压加热器采用卧式横束管的意义在于()

A.
传热效果较好
B.
占地面积小
C.
汽水阻力小
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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

【多选题】⾼压加热器分为()

A.
混合式
B.
表⾯式
C.
对流式
D.
逆流式

【多选题】550#高低压隔离阀有哪些()

A.
PV001
B.
PV011
C.
FV002
D.
FV003
E.
W003补氨阀
F.
W0O6补氨阀