奥氏体不锈钢焊后处理的目的是增加其冲击韧度和强度。( )
参考答案：错
下列变化中属于化学变化的是（ ）
A．水结成冰
B．铅芯断裂
C．汽油挥发
D．煤气燃烧
A client with heart failure loses 3.2 kg while hospitalized. Approximately how many pounds has the client lost()
A. 1 pound.
B. 3 pounds.
C. 5 pounds.
D. 7 pounds.
