从指定的d:/aa.txt文件中按行读取信息，下列初始化流正确的是（ ）
A. BufferedReader in=new BufferedReader(“d:/aa.txt”);
BufferedReader in=new BufferedReader(new FileReader(“d:/aa.txt”));
C. BufferedInputStream in=new BufferedInputStream(new Reader(“d:/aa.txt”));
D. BufferedInputStream in=new BufferedInputStream(new FileInputStream(“d:/aa.txt”));
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使用System.in.read()从控制台输入的结束标记为（ ）
A. -1
B. null
C. exit
D. 以上都不对
下列声明语句不正确的是（ ）：
A. Writer out= new BufferedWriter(new Writer(“f:/tt.txt”));
B. Writer out=new BufferedWriter(new FileWriter(“f:/tt.txt”));
C. Writer out=new FileWriter(“f:/tt.txt”);
D. Writer out=new FileWriter(new File(“f:/tt.txt”));
FileInputStream in=new FileInputStream("e:/java/aa.txt");int b=in.read();字节流结束标志是（）
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