泡沫灭火剂的灭火作用有：
A、冷却
B、窒息
C、隔热
D、A+B+C
参考答案：D
Surely many questions will ____ about Haiti’s future after the big earthquake, which has been the strongest in Haiti in the past 200 years.
A．rise
B．arise
C．raise
D．announce
正常两侧髂静脉汇合成下腔静脉的平面为()
A.L3
B.L5
C.L2
D.L4
E.L1
