[问答题] 何为“过剩Ar”、“Ar丢失”?
[单选题]They are barely in their twenties and are already multimillionaires. At the age when many people are looking for their first job, the youngsters of The Sunday Times Rich List are buying country estates or jetting off to their overseas homes.Daniel Ra
[主观题]以下程序的输出结果是( )。 define PR(ar)printf("ar=%d”,ar) main() {int j,a[]={1,8,3,7,6,13,17,15},*p=a+5; for(j=3;j;j--) switch(j) {case 1: case 2:PR(*p++);break; case 3:PR(*(--p)); } }
[问答题] 相对于传统的K-Ar体系定年方法,40Ar-39Ar方法的主要优点是什么?