引起皮肤黏膜出血的病因中，因血小板消耗过多所致的是（）
A.血友病
B.急性白血病
C.特发性血小板减少性紫癜
D.DIC
E.过敏性紫癜
参考答案：D
China has offered much help to Japan since it ___________ by the earthquake and tsunami (海啸).
A. hit B. is hit C. was hit
用窒息法灭火，使空气中的含氧量降到21%以下时，火即熄灭.
