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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】电热恒温水浴锅水箱内有测温元件，可通过面板上的控温调节旋钮调节温度，可调范围为( )。
A.
0～100 ℃
B.
室温～100 ℃
C.
0～200 ℃
D.
40～100 ℃