39. A machine's efficiency is reduced by _____. (A) the work it puts out (B) the energy it puts into (C) the friction it produces (D) the energy it supplies

39. A machine's efficiency is reduced by _____.
(A) the work it puts out
(B) the energy it puts into
(C) the friction it produces
(D) the energy it supplies

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統計： A(11), B(18), C(140), D(15), E(0) #2351377

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Irene Lin

B1 · 2020/06/16

#4069165

第二段可看出: No machine c...

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42. According to the passage, which of the following is true? (A) Some homeowners believe they need to do something to prevent further climate change. (B) The buildings within the author’s neighborhood are not allowed to make any restoration. (C) The author envies those living in the heart of the city where historical buildings are preserved. (D) Some homeowners are wary of the damages brought forth to their living by installing solar panels.

39. A machine's efficiency is reduced by _____.
(A) the work it puts out
(B) the energy it puts into
(C) the friction it produces
(D) the energy it supplies

詳解 (共 1 筆)

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