未知题型 In fact, many classroom materials, especially those that are older, may contain gender bias in _____4_____, photos, or words.

未知题型 模板继承可以使用（ ）标签来实现。

单项选择题 下段程序的输出是（ ） class Program { static void Main(string[] args) { string path = @"D:/1.txt"; FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite); string message = "123456789abcdefg"; byte[] info = new UTF8Encoding(true).GetBytes(message); fs.Write(info, 5, 4); fs.Flush(); fs.Close(); } } A、6789B、5678C、4567D、3456