問題詳情
21. The word "they" in line 9 refers to
(A) formulas
(B) databases
(C) numbers
(D) objects
(A) formulas
(B) databases
(C) numbers
(D) objects
參考答案
答案：D
難度：適中0.4375
統計：A(17),B(11),C(7),D(28),E(0)
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