I didn't pass the math exam, because I had no _______ to finish it. [ ]

A. enough time  

B. time enough  

C. many time  

D. many times

流行性脑膜炎皮肤瘀点的病理基础是（）

A.血管通透性增加

B.血小板减少，凝血因子消耗

C.广泛的血管内凝血

D.细菌及内毒素致小血管栓塞性炎症

E.血清钙严重降低