当你遇到下图情况时，应当[ ]
A．奋不顾身，以死相搏
B．赶快回避，免受伤害
C．拨打“110”报警
D．暗中观看事情发展
答案：C
氧流量4L/min吸入时，氧浓度为（）。
A.25%
B.29%
C.33%
D.37%
E.41%
_____sustainable development, measures are being drafted to control rising prices.[ ]
A. For the sake of
B. In favor of
C. In case of
D. In memory of
