問題詳情

16. Which of the following occurred as the ices from Halley's Comet evaporated?
(A) Black dust was left on the comet's surface.
(B) The nucleus of the comet expanded.
(C) The tail of the comet straightened out.
(D) Jets of gas caused the comet to increase its speed.

參考答案

答案:A
難度:非常困難0
統計:A(0),B(0),C(0),D(0),E(0)

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