問題詳情
63 The scientists used tiny GPS receivers to track the ______ routes of black-faced spoonbills—birds that flythousands of kilometers to places like Taiwan and Hong Kong and spend the winter months there.
(A) development
(B) communication
(C) migration
(D) concentration
參考答案
答案：C
難度：非常簡單1
統計：A(0),B(0),C(2),D(0),E(0)