Steam engines refer to machines usingto perform mechanical work through the agency of heat.（ ） A.steam B.steam engines C.steam cars D.steam power
正确答案：D
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Steam engines refer to machines usingto perform mechanical work through the agency of heat.（ ） A.steam B.steam engines C.steam cars D.steam power
正确答案：D
![以下程序的输出结果为?public class Test { public static void main(String args[]) { for ( int k = 0; k < 3; k++) System.out.print("k"); }} A.k B.kkk C.012 D.0123](https://zhenti.52daan.com/wp-content/themes/dashscroll/img/thumb-medium.png)