“艾宾豪斯遗忘曲线”显示的遗忘规律表现为()
A．时快时慢
B．先慢后快
C．先快后慢
D．均匀递减
E．均匀递增
参考答案：C
—______ is this? Is it a ruler?
—Yes, it is a red ruler.
A．How
B．Who
C．What
D．What color
急性心力衰竭急救时是给氧流量为（）
A.1—2L/min
B.2—4L/min
C.4—6L/min
D.6—8L/min
