机车榆修修程规定：小修时对机车全面检查，（）解体检修。
A.主要部件
B.关键部件
C.各部件．管系等
参考答案：B
_____in the ticket hall for almost an hour, I suddenly realized I had left my ID card home. [ ]
A. To wait
B. To have waited
C. Waiting
D. Having waited
下列关于溃疡性结肠炎的肠外表现中，随结肠炎控制或结肠病变切除后可以缓解或恢复的是（）
A．原发性硬化性胆管炎
B．强直性脊柱炎
C．眼的巩膜外层炎
D．骶髂关节炎
E．淀粉样变性
