题目

Computers are useful machine（机器）. They can help people a lot in their daily life. For example, They can help people to save much time to do much work, and they can help people to work out many problems they can’t do easily. Our country asked everyone except the old people, to learn to use computers before the twenty-first century. Today more and more families own computers. Parents buy computers for their children. They hope computers can help them improve（改善） their studies in school. Yet, many of the children use computers to play games, to watch videos or to sing k17．下面图案中是轴对称图形的有（　　）A．1个B．2个C．3个D．4个