未知题型 A company"s cost of goods sold was $15,500 and its average merchandise inventory was $4,500. Its inventory turnover equals 3.4.

单项选择题 以下代码运行输出是（ ） public class Person{ private String name=”Person”; int age=0; } public class Child extends Person{ public String grade; public static void main(String[] args){ Person p = new Child(); System.out.println(p.name); } } A、输出：PersonB、没有输出C、编译出错D、运行出错

未知题型 如果一种植物只生活在栽培状态下，称为，