题目内容

注意：不改动程序结构，不得增行或删行。
package ch3;
import java.io.*;
public class Test
{
public static void main(String[] args)
{
try
{
fos=new("ch3/file.dat");
__
}
catch(IOException ioe)
{
ioe.printStackTrace();
}
}
}

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Part B
Cell phones are very popular now; even the primary school students hold one everyday. What do you think of its advantages and disadvantages？ Write an essay of about 120 words to state your opinions.