一、选择题(前五题多选其余单选): 1. 读写原始数据,一般采用什么流?( ) A InputStream B DataInputStream C OutputStream D BufferedInputStream 答案:AC 2. 为了提高读写性能,可以采用什么流?( ) A InputStream B DataInputStream C BufferedReader D BufferedInputStream E OutputStream F BufferedOutputStrea