public class Example { String str = new String("Java"); StringBuffer sb = new StringBuffer("C#"); public void strcat(String str, StringBuffer sb) { str = str + " study"; sb = sb.append(" exam"); } public static void main(String args[]) { Example ex = new Example(); ex.strcat(ex.str, ex.sb); System.out.println(ex.str); System.out.println(ex.sb); }}程序的输出结果是：______

【单选题】ex amine A. ex pert B. ex cellent C. ex press D. ex ample A. ex pert B. ex cellent C. ex press D. ex ample

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

Which one of the following expressions is the most accurate?: CA - IM = EX|CA = EX + IM|CA = EX - IM|CA = EX = IM|CA = IM - EX

正压型防爆标志表示（） A: Ex d B: Ex q C: EX e D: EX p

wave to/at sb wave goodbye to sb

D(X)=EX^2-(EX)^2其中(EX)^2怎么计算?

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