問題詳情
【題組】47 Which of the following is one of the indirect approaches to detect a brown dwarf?
(A)To simply take a picture of it
(B)To compare its weight to a nearby star’s
(C)To see if a star nearby is quavered by the gravity of a dwarf
(D)To see if extra light is added to a dwarf by a certain bright star
參考答案
答案：C
難度：適中0.463415
統計：A(11),B(31),C(57),D(21),E(0)