氨制冷系统设备较多，管路复杂，常采取的排污方法是（）排污法。
A、分段
B、整体
C、定时
参考答案：A
An ideal job should be one that ______ what you are good at with what you are interested in.
A．combines
B．connects
C．relates
D．joins
社会性是 * * 的（）特性。
