题目

Money Matters Parents should help their children understand money.  36   So you may start talking about money when your child shows an interest in buying things, candy or toys, for example. 1. The basic function of money Begin explaining the basic function of money by showing how people trade money for goods or services. It is important to show your child how money is traded for the things he wants to have. If he wants to have a toy, give him the money and let him hand the money to the cashier(收银员).  37  When your child grows a bit older and understands the basic function “a=b”是“直线y=x+2与圆（x-a）2+（y-b）2=2相切”的（ ）A．充分不必要条件B．必要不充分条件C．充分必要条件D．既不充分又不必要条件