(多选题)15: 下面哪些代码段是正确的Java源程序？ （）
A: package testpackage;
public class Test{//do something...}
B: import java.io.*;
package testpackage;
public class Test{// do something...}
C: import java.io.*;
class Person{// do something...}
public class Test{// do something...}
D: import java.io.*;
import java.awt.*;
public class Test{// do something...}
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