How many races are there?中文是什么

How many races are there?中文是什么 how many bears are How many derks are how many trees are how many books are 几道GRE数学题1.In a series of races,10 toys cars are raced,2 cars at a time.If each car must race each of the other cars exactly twice,how many races must be held?2.The daily rate for a hotel room that sleeps 4 people is $39 for one person and x I don't know__sheep there__on the farmA.how many ,areB.how much ,are请问为什么 how many legs are there? how many stop are there How many pears are there? How many stars are there? How many birdges are there? HOW MANY BOOKS ARE THERE How many people are zhere? How many people are there? How many apples are these how many girls are there How many pig are three?