【简答题】用欧几里得算法(辗转相除法)求解两个整数 a,b 的最大公约数。
【判断题】Globe valves are most commonly used for throttling service.
【判断题】Globe valves are mechanical valves that prevent reverse flow in piping
【判断题】Globe valves can be opened but only require one-quarter turn on a handle.
【单选题】反应A→B(I);A→D(II),已知反应I的活化能E1大于反应II的活化能E2,以下措施中哪一种不能改变获得B和D的比例?()
【单选题】反应I: A→B,反应II:A→D。已知反应I的活化能 E a1 大于反应II的活化能 E a2 ,以下措施中哪一种不能改变获得B和D的比例( )
【判断题】Globe valves should not be used to throttle flow for extended periods.
【判断题】Unlike the gate and globe valves, a ball valve doesnot lift the flow-control device out of the process stream.