一次函数y=2x+1的图象与x轴交点的坐标是( ),与y轴交点的坐标是( )。
(-,0);(0,1)
你对苏联的社会主义模式有何认识?
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常用的通气模式有()
A.控制通气
B.辅助/控制通气
C.间歇指令通气
D.压力支持通气
E.呼气末正压