和相对论一起构成现代物理学框架的是（）
A.牛顿力学理论
B.万有引力理论
C.量子理论
D.自由落体理论
参考答案：A
Only when I lost the opportunity to take my first job ____ how important it was to me.
A. I realized B. I had realized C, had I realized D . did I realize
遗尿症的特点是( )。
A．可能在应激或创伤事件后出现
B．通常是不自主的而非是故意的
C．可合并广泛的情绪及行为障碍
D．存在排尿控制能力的发育延迟
I realized D . did I realize