属于以兴奋性增高为主的神经中枢急性失调的表现是
A．昏迷
B．嗜睡
C．谵妄
D．昏睡
E．意识模糊
参考答案：C
采空区上覆岩层按其破坏程度不同可分为（）、（）和（）。
He had little idea that it was getting so late, ________?[ ]
A. didn't he
B. wastn't it
C. did he
D. was it
