若某用户E-mail地址为shikbk@online.sb.cn，那么邮件服务器的域名是（） A: shjkbk B: online C: sb.cn D: online.sb.cn

某用户的E-mail地址为shjkbk@online.sh.cn，_______是该用户的最高层域名。 A: cn B: shjkbk C: sh D: online

某用户的E-mail地址为:dsho@online.sh.cn,则该用户的用户名为 A: online B: sh C: dsho D: cn

某用户的E-mail地址为shjkbk@online.sh.cn，下面的（）是该用户的用户名。 A: Shjkbk B: online C: sh D: cn

O2O的定义是? Online To Offline|offline to Online to offline|Online to offline to online|offline to online

O2O的定义是 A: offline to online B: Online To Offline C: offline to Online to offline D: Online to offline to online

O2O的形式有 A: Online to offline B: offline to online C: offline to Online to offline D: Online to offline to online

wave to/at sb wave goodbye to sb

呼吸性碱中毒中（） A: AB＞SB B: AB＜SB C: A D: SB均正常 E: A F: SB均低于正常 G: A H: SB均高于正常

分析下面的Java程序段,编译运行后的输出结果是( )。public class Test {public void changeString(StringBuffer sb) {sb.append("stringbuffer2");}public static void main(String[] args) {Test a = new Test();StringBuffer sb = new StringBuffer("stringbuffer1");a.changeString(sb);System.out.println("sb = " + sb);}} A: sb = stringbuffer2stringbuffer1 B: sb = stringbuffer1 C: sb = stringbuffer2 D: sb = stringbuffer1stringbuffer2