站级系统安装顺序正确的是（） A: POS——BOS——Fuelsvr B: Fuelsvr——BOS——POS C: BOS——POS——Fuelsvr D: Fuelsvr——POS——BOS

BOS是指：

11. Page 9 ② Complete the cover letter with the given information in the bos below. 22. Page 9 ② Complete the cover letter with the given information in the bos below. 33. Page 9 ② Complete the cover letter with the given information in the bos below. 44. Page 9 ② Complete the cover letter with the given information in the bos below.

BOS用户必须签到后方可处理业务。普通授权用户可直接进行授权。BOS用户在ABIS中处于（）等状态，必须在BOS做相应变更。 A: 签到 B: 休假 C: 删除 D: 签退

阅读下列代码 import java.io.*; public class Example{ public static void main(String[] args) throws Exception { // 创建一个带缓冲区的输入流 BufferedInputStream bis = new BufferedInputStream(new ________( "src.txt")); // 创建一个带缓冲区的输出流 BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("des.txt")); int len; while ((len = bis.read()) != -1) { bos.write(len); } bis.close(); bos.close(); } } 请说出程序中,下划线位置的答案( )

BOS用户必须签到后方可处理业务。普通授权用户可直接进行授权。BOS用户在ABIS中处于（）等状态，必须在BOS做相应变更。 A: A签到 B: B休假 C: C删除 D: D签退

下列BOS用户说法正确的是（）。 A: AABIS柜员在BOS中的用户码，须与其ABIS柜员号一致 B: BABIS柜员在BOS的用户密码可以和ABIS不同 C: CBOS用户在ABIS中处于休假、删除等状态，必须在BOS做相应变更 D: DBOS用户临时离岗应执行临时签退

The air-conditioner is running in the winter and to be stopped, we should（） A: close Fan and Humidifier at the same time B: firstly close Fan and then close humidifier immediately C: firstly close humidifier and then close Fan immediately D: firstly close humidifier and then close Fan after 30 second

But American friends may not be close, or they are close with ______ .

下面正确的关闭文件的语句格式是( ) A: close(变量名) B: .close() C: close(文件名) D: .close