给水泵在运行中入口发生汽化有哪些象征?
参考答案:
给水泵在运行中入口发生汽化的象征有:泵的电流、出口压力、入口压力、流量剧烈变化、泵内伴随有噪声和振动声音。
—Did they clean the house yesterday afternoon?
—______. They cleaned it this morning.
A.No, they don’t
B.Yes, they did
C.No, they didn’t
D.Yes, they do
哪项是指查明程序错误时可能采用的工具和手段
A.纠错技术
B.测试纠错
C.跟踪法
D.动态测试