60Si2Mn这个钢中含硅量在1.5~2.49%范围内。
60Si2Mn这个钢中含硅量在1.5~2.49%范围内。
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写出程序运行的结果Public class BasePublic virtual string Hello() {return “Base”;}Public class Sub:BasePublic override string Hello() {return “Sub”;}1. Base b = new Base(); b.Hello;2. Sub s = new Sub(); s.Hello;3. Base b = new Sub (); b.Hello;4. Sub s = new Base(); s.Hello;
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