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【单选题】
工作在200°C和50°C两热源间的卡诺热机效率为( )A.
75%
B.
68%
C.
32%
D.
25%
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A.
controversy
B.
resemblance
C.
diversification
D.
agreement
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A.
additional
B.
excessive
C.
adequate
D.
extensive
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A.
considered
B.
located
C.
advised
D.
modified
【单选题】The flower shop became prosperous with its __________of roses with high quality and various colors.
A.
procession
B.
array
C.
succession
D.
string
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