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【单选题】
CRH2A型动车组保温试验转换开关正常使用位置是置于左侧，功能是试验辅助加热器的性能（强制闭合）（）℃以上，可强制投入保温加热器。
A.
10
B.
15
C.
5
D.
20
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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
【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
【单选题】当2个EFI转换开关放ALTN位，左侧F/D选择开关放L，右侧放R，这时：（）
A.
左EADI上F/D来自L FCC，右EADI上F/D来自R FCC
B.
左、右EADI上F/D来自C FCC
C.
左、右EADI上F/D来自L FCC
D.
不确定