[单选题]事故结案时限。发生从业人员轻伤事故的于20日内、发生从业人员重伤或死亡事故的于15日内，以（A）向路局安全监管办提交伤亡事故处理报告和伤亡事故调查报告书及有关材料
A.文件形式
B.通知
C.记录

D
Forty-thousand of the world’s young children die every day. Many of these deaths can be prevented. In fact, experts say, techniques now exist to save the lives of half of these children. The techniques are medically effective(有效的), simple to use and low cost. The biggest task has been to inform parents ’about these life-saving techniques.
Diarrhea(腹泻) is the main cause of death among children in developing countries. Diarrhea results when the body tries to clear itself of harmful bacteria (细菌). The body does this by getting out liquids, sometimes uncontrollably. If too much water, sugar and salt are lost in this way, the body cannot work normally. The child may die.
The United Nations International Children’s Fund, UNICF, introduces a technique. It uses a simple mixture of sugar and salt in water. The mixture does not stop diarrhea. But if used often as needed, it keeps fluid (体液) levels normal until the body has fought off the h
A. the life-saving ways are medically effective
B. their parents are rich enough for the life-saving techniques
C. the life-saving techniques are easy to use
D. their parents learn the life-saving techniques