public class StringBufferTest {public static void main(String[] args) {StringBuffer sb=new StringBuffer("aynu,aynu");sb.deleteCharAt(4);System.out.println(sb);//第1空sb.delete(4, 8);System.out.println(sb);//第2空}}

下面代码段输出的结果是（ ）StringBuffer sb = new StringBuffer("huangjianfeng");sb.delete(1,3);System.out.println(sb.toString()); A: ngjianfeng B: hgjianfeng C: hngjianfeng D: hjianfeng

class Test { public static void main(String[] args) { StringBuffer sb = new StringBuffer("hello world"); sb.delete(6,sb.length()); System.out.println( sb.toString() ); } } A: Hello w B: Hello C: Hello worl

填入适当的介词 deprive sb ________ sth rob sb _______ sth remind sb _______ sth notify sb _______ sth accuse sb ________ sth

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

急性呼吸性酸中毒时,AB和SB变化特征为: A: AB(实际碳酸氢盐)升高 B: SB(标准碳酸氢盐)升高 C: AB<SB D: AB>SB E: AB↓、SB↓、AB=SB

在疾病状态下，SB与AB可以不相等。SB〉AB表示有（），SB

急性呼吸性酸中毒时, 可以出现 A: SB 增加 B: AB 淢少 C: SB < AB D: ​SB > AB E: SB = AB