溢流堰的过堰流量与堰顶水头的（）次方成正比。 ["1次方","2次方","3\/2次方","1\/2次方"]
溶血指数
为了消除上活塞与上阀门间的排气间隙（图示1.2±0.2mm）所需要的踏板行程，称为（）。
制动控制的参数一般为（）、（）以及（）的三者综合。
You create an isntance of a BackgroundWorker Component named backgroundworker1.You discover that when the application attempts to cancel the background process you get an exception from the following code segment： backgroundworker1.CancelAsync（）； You need to configure the BackgroundWorker component appropriately to prevent to application from exception.What should you do？（） ["Cancel the background process in the backgroundworker1_DoWork event","Set the IsBusy property og backgroundworker1 to True before you attempt to cancel","Set the WorkerSupportsCancellation property of backgroundworker1 to true before the code","Set the DoWorkEventArgs Cancel property to true"]
仓储技术作业过程
