题干
There is no point arguing about what _____ the accident. The point is what to do with the victims of it.
A：led to
B：caused to
C：accounted to
D：resulted from
答案(点此获取答案解析）
A
，第二道工序出一级品的概率为
，第三道工序出一级品的概率
，则这种产品出一级品的概率是 （ ）