試題詳解

45. According to the article, what is NOT one of the definitions of plutoids?
(A) The plutoids must be close to Pluto.
(B) The plutoids should be big enough to overcome body forces.
(C) The plutoids need to have certain brightness.
(D) The plutoids should be of near-spherical shape.
(E) The plutoids must be part of the Kuiper Belt.