28. According the National Academy of Sciences, the Earth's surface temperature has risen by one degree Fahrenheit  in the past century, with accelerated warming during the past two decades.
(A)According 
(B)has risen 
(C)by one degree 
(D)in the past century 
(E)accelerated warming .

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統計: A(47), B(2), C(1), D(1), E(10) #2055395

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