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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
【单选题】16V240ZJB柴油机功率2430kw、气温20℃、进口水温45℃,中冷器使145℃增压空气降到();
A.
45℃以下
B.
65℃以下
C.
88℃以下
D.
20℃