题目

One of the proudest moments in my life is ________ I was rewarded for my courage after saving a drowning child. A . that B . when C . what D . which 答案：B蛔虫病的传染源是（    ） A、粪便  B、没洗干净的手  C、不干净的瓜果  D、粪便内有蛔虫受精卵的人