腺垂体功能减退症最常见原因是
A．希恩(Sheeha综合征
B．各种垂体肿瘤
C．原发性空蝶鞍症
D．糖尿病血管病变
E．颅内感染后遗症
参考答案：B
— Jack failed his test again.
— Little ________how disappointed his parents were. [ ]
A. he realized
B. did he realize
C. he did realize
D. realized he
根据表“tCourse”的结构，判断并设置主键。
