窗口將在 5秒后自動關閉.
名複: investigations
n.
兩名警察對這一事故展開調查。
a.
investigative
同義參見:
以上來源於:《英漢大辭典》
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調查;調查研究
以上來源於:《英漢醫學詞典》
文法測驗
No one knows how the fire broke out. The police have started an ______ into the cause of it.
(A) appreciation
(B) extension
(C) operation
(D) investigation