5C4X.S9h*M6Q4v(H
(1)一共有多少个?*n:k*P7k,s2Y8C4H7X:~+j0t*f1p'{,U/J 5C4X.S9h*M6Q4v(H
(2)把左边第2个拿走后还剩几个?8].Z.q9g-{ 5C4X.S9h*M6Q4v(H