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【单选题】
当30LDP28BB001电热水箱内温度低于（）时，启动两组电加热器
A.
A. 55℃
B.
B. 80℃
C.
C. 65℃
D.
D. 75℃
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【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