题目

When you cut your skin，you blood（流血）．If a person loses a lot of blood，he will become ill and may die．Blood is very important．People have always known that．At one time in history, some people even drank blood to make them strong!     When doctors understand how blood goes around inside the body, they try ways of giving blood to people who need it．They take blood from the healthy people and give it to people who need it．This is called“blood transfusion”．The blood goes from the arm of the healthy person to the arm of the sick people．     But there are two pro选择合适条件的字母填在横线上，再解答出来． 　　条件：A．三年级有4个班的同学去春游； 　　　　　B．平均每班去36人； 　　　　　C．每人往返车费10元； 　　　　　D．每人门票8元； 　　　　　E．全年级正好乘3辆大客车； 　　　　　F．全年级正好乘6辆小客车； 　　①__________________，三年级共交门票多少元？ 　　②__________________，每辆大客车平均乘多少人？