Joan sang(A) while(B) she walked along(C), with(D) a book in her left hand.
查看答案
Jack was washing(A) dishes(B) then(C) Mary knocked at(D) the door and entered.
No sooner(A) he left(B) Beijing than(C) his mother fell sick(D).
在人工智能技术快速发展的形势下,交通行业的安防建设利用人工智能技术实现了智能化发展,具体表现在那些方面?