外部排序
参考答案：
指的是待排序记录的数量很大，以致内存一次不能容纳全部记录，在排序过程中对外存进行访问的排序过程。
32岁男性，无明显诱因发现右颈部包块，感疼痛1个月，行TcO甲状腺静态显像如图，最可能的诊断是()
A．亚甲炎
B．右甲状腺腺瘤
C．桥本氏病
D．甲状旁腺功能减退
E．Graves’病
In the middle of the twentieth century, people in North America ______.
A．were tired of the Nuclear Family
B．wanted to give up the Nuclear Family
C．believed that the Nuclear Family was hopeful
D．were indifferent to the Nuclear Family
