阿摩線上測驗
51. What does the passage mainly discuss?
(A) The production of solar light and heat.
(B) The physical and chemical nature of life.
(C) The conversion of hydrogen to helium.
(D) Radiation in the X-ray part of the spectrum.
(E) The nuclear energy of the Sun.
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統計： A(11), B(6), C(0), D(0), E(9) #1093413
統計： A(11), B(6), C(0), D(0), E(9) #1093413
