本题中定义了一个长度为20的整数数组，然后将1～20分别赋给数组元素，计算该数组中所有下标为奇数的元素的和。 public class javal public static void main(String argsp[]) int sum; ______； int arrayList[]=new int[20]; for(int i=0;i＜=19;i++) arrayList[i]=i+1; int pos=0; while(pos＜20) if(______) sum=sum+arrayList[pos]; ______; System.out.println("sum="+sum);

A. 对
B. 错

A. 对
B. 错

A. he wants to let the audience know how people think of manners
B. he proves that the issue of manners is a question of individual taste
C. he thinks how people think of social manners should be diversified
D. he hopes to bring the attention of the audience to the public opinion

A. 对
B. 错