题目

A new study by Penn State College of Medicine research team found that honey is a better and safer treatment for children than cough medicines.    Ian Paul, the study’s lead researcher, was motivated to test honey because treating coughs in children has recently become a sticky subject. Coughing is the body’s way of cleaning irritated (受刺激的) airways to help you breathe. But too much coughing can irritate your lungs and throat even more. It can also make it tough to get the sleep your body needs to heal. Hoping to ease the suffering of their children, parents often give them cough某个路口的红绿灯设置情况是：红灯的持续时间为30秒，黄灯的持续时间为5秒，绿灯的持续时间为40秒，当你到达该路口时，看见下列情况的概率各是多少？（1）绿灯      （2）不是红灯．