The main difterence between a motor control circuit containing low voltage protection and low voltage release is that the latter contain A.a magnetic operating coilB.normally open line contactsC.thermal-overload protectionD.a momentary-contact start button
The main difterence between a motor control circuit containing low voltage protection and low voltage release is that the latter contain
A.a magnetic operating coil
B.normally open line contacts
C.thermal-overload protection
D.a momentary-contact start button
相关考题:
ENUM类型的字段level定义为(LOW、MIDDLE、HIGH),ORDERBYlevelasc的顺序是() A、HIGH、LOW、MIDDLEB、LOW、MIDDLE、HIGHC、MIDDLE、LOW、HIGHD、HIGH、MIDDLE、LOW
Foroccasionalheavyloads.twocranescanbearrangedtoworktogether.Theoperatingofordeckcranemotorsmaybehydraulicorelectric() A、principleB、mediumC、instructionD、voltage
Which of the following characteristics must be matched depending on the specifications of thepower grid for the country a PSU will be utilized in?() A. WattageB. AmperageC. ResistanceD. Voltage
WhichstatementsistrueaboutForeignExchangeStation(FXS)portsonarouter?() A.theFXSinterfaceallowsananalogconnectiontobedirectedatthepublicswitchedtelephonenetwork(PSTN’s)centralofficeB.theFXSinterfaceconnectdirectlytoastandardtelephone,faxmachine,orsililardeviceandsuppliesring,voltage,anddialtoneC.theFXSinterfaceconnectdirectlytoanIPphoneandsuppliesring,voltage,anddialtoneD.theFXSinterfaceconnectdirectlytoISDNvoicechannels
WhichstatementistrueaboutForeignExchangeStation(FXS)portsonarouter?() A.TheFXSinterfaceallowsananalogconnectiontobedirectedatthepublicswitchedtelephonenetwork(PSTN’s)centraloffice.B.TheFXSinterfaceconnectsdirectlytoastandardtelephone,faxmachine,orsimilardeviceandsuppliesring,voltage,anddialtone.C.TheFXSinterfaceconnectsdirectlytoanIPphoneandsuppliesring,voltage,anddialtone.D.TheFXSinterfaceconnectsdirectlytoISDNvoicechannels.
假设待查找区间的起始位置和终止位置分别为low和high,则二分查找算法在下面情况出现时说明找不到要查找的数据()。A.low >highB.low<highC.low=highD.low<=high
5、假设待查找区间的起始位置和终止位置分别为low和high,则二分查找算法在下面情况出现时说明找不到要查找的数据()。A.low >highB.low<highC.low=highD.low<=high
下面进行二分搜索的正确代码是A.def BSearch(data,x): low=0 high=len(data)-1 while(low<=high): mid=(low+high)//2 if(data[mid]==x): return mid elif(data[mid]<x): high=mid-1 else: low=mid+1 return -1#B.def BSearch(data,x): low=0 high=len(data)-1 while(low<=high): mid=(low+high)//2 if(data[mid]==x): break elif(data[mid]<x): low=mid+1 else: high=mid-1 return -1#C.def BSearch(data,x): low=0 high=len(data)-1 mid=(low+high)//2 while(low<=high): if(data[