問題詳情
2 After the patent period runs out, the invention enters the public ______, which means that anyone can freely produce and sell the invention without paying the prior patent holder. Choose the one word that best completes the above sentence:
(A) order
(B) policy
(C) interest
(D) domain
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)