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【单选题】
500°C恒温热源下100KJ的热量所具有的有效能为( )(T0=298K)A.
约20 kJ
B.
约40 kJ
C.
约60 kJ
D.
100 kJ
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举一反三
【单选题】听力原文：Have you well prepared for your final examination? (A) I think math is difficult for me. (B) Yes, I have confidence to get the highest score. (C) I think the final game is boring. (34)
A.
B.
C.
【单选题】I think math is ________. [ ]
A.
real difficult
B.
really difficult
C.
real busy
D.
really tired
【单选题】—I think math is _____ English. —I don't think so. I think English is more difficult. [ ]
A.
as useful as
B.
as important as
C.
as difficult as
D.
as interesting as
【单选题】—I think English is the most difficult subject. —_____.I think math is more difficult than English. [ ]
A.
I think so
B.
I don't hope so
C.
I agree
D.
I disagree
【单选题】I think math is as ___ as English. [ ]
A.
important
B.
very important
C.
less important
D.
the least important
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