挑战习题
1/5单选题
难度:

1.一台汽油机的功率为33kW,工作8h共消耗汽油80 kg,则此汽油机的效率为(q汽油=4.6×107 J/kg)()
A 26%
B 89%
C 2.6%
D 8.9%
提示1:
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正确答案:QQ==
5qC55o2u5YWs5byPzrc9VzxzdWI+5pyJ55SoPC9zdWI+L1E8c3ViPuaAuzwvc3ViPsOXMTAwJe+8jFc8c3ViPuacieeUqDwvc3ViPj1QdO+8jFE8c3ViPuaAuzwvc3ViPj1tcTxzdWI+5rG95rK5PC9zdWI+77yM5bCG5pWw5o2u5Luj5YWl5LiK6L+w5LiJ5Liq5YWs5byP77yM5Y+v5b6Xzrc9IDI2Je+8jOaJgOS7peetlOahiOS4ukEu