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【单选题】
最确切的说法是:直流电动机就是( )的旋转电机。A.
电能转成热能
B.
电能转成机械能
C.
热能转成电能
D.
机械能转成电能
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举一反三
【单选题】Regarding global warming, the following statements are true EXCEPT ______.
A.
global warming is the result of 250 years of capitalist accumulation
B.
human activity in general directly leads to global warming
C.
the massive burning of fossil fuels has caused climate change
D.
a typical capitalist environmental crisis can be best exemplified by global warming
【简答题】The science behind global warming.
【单选题】Global Warming Ⅰ. INTRODUCTION Global warming increases in the average temperature of the atmosphere, oceans, and land- masses of Earth. The planet has warmed many times during the 4.65 billion years ...
A.
Y
B.
N
C.
NG
【简答题】小肠病变引起的腹痛多发生在( )
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