辨析：a traffic accident; a traffic case; a traffic mishap; a road accident;汽车撞行人的那种

辨析：a traffic accident; a traffic case; a traffic mishap; a road accident;汽车撞行人的那种 a traffic light a traffic h_____this morning traffic traffic traffic traffic traffic traffic traffic traffic traffic 短语辨析2.Why was the road crowded?The traffic was___ A___ by a car accident.A.held up B.held back C.held out D.held to请解析为什么不能选B, a lot of traffic是什么意思 there a lot of traffic?” a traffic accident ＆the traffic accident有什么区别? what heavy traffic还是what a heavy traffic a traffic jam的traffic是形容词吗?若是为何traffic字典无形容词意思