49. The author implies that, compared with those of the past, contemporary lighthouses _____.
(A) employ more powerful lights
(B) require less maintenance
(C) are more difficult to operate
(D) are more romantic

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統計： A(17), B(137), C(21), D(12), E(0) #593192

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#6026496
如下文(對照):       In th...
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#4771839
In the past, lightho...
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