問題詳情
8. Similar to ordinary dolphins, bats have a highly _________sonar system, called echolocation,which allows bats to avoid obstacles and track tiny insects in total darkness.
(A) navigated
(B) sophisticated
(C) decorated
(D) compact
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增