依据《节约能源法》，对落后的耗能过高的用能产品、设备实行（）制度。
A.淘汰
B.限期治理
C.革新改造
D.限制使用
参考答案：A
氧气带、乙炔带颜色是（）。
A.红色＋黑色
B.红色＋白色
C.蓝色+黑色
D.黑色＋白色
Since Jonas Salk came up with his polio vaccine, infantile paralysis has virtually disappeared from the United States.
A．surfaced with
B．raised the price of
C．discovered
D．elevated
