While the parallel operation, （） must be used.

A、increases in north latitude and decreases in south latitude B、decreases as DLO increases C、increases with increased latitude D、decreases with increased latitude

A . connected load B . prime mover speed C . field excitation D . generators rated voltage

A . the sum of the powers used in each load (resistor) B . divided by the number of loads C . always less than the power used in the smallest load D . the sum of the powers used in each individual load never more than the power used in the largest load

A . larger than the greatest branch resistance B . smaller than the lowest branch resistance C . equal to the sum of the individual branch resistances D . one-half the sum of the individual branch resistance

A . The total current flow equals the sum of the individual currents B . The total current flow equals the reciprocal of the sum of the individual currents C . The total resistance equals the sum of the individual resistance D . The total voltage equals the sum of the individual voltages across each resistance

A .  high scalability B .  the design supports a layered security model C .  firewall addressing does not need to change D .  IPsec decrypted traffic is inspected by the firewall E .  there is a centralized point for logging and content inspectio

A . Trip the generator off the switchboard B . Turn off all electrical equipment C . Remove the load from the "off going" generator D . Increase the cycles of the generator staying on the line

A . amount of field excitation of the leading machine B . load-speed characteristics of the governors C . amount of field excitation to the lagging machine D . type of alternator

A . zero B . eliminated C . different D . equal

A .  Up to 25 m bus length B .  Only one device per SCSI bus C .  Up to 16 devices per SCSI bus D .  Half-duplex operation E .  Full-duplex operatio

A . high scalability B . the design supports a layered security model C . firewall addressing does not need to change D . IPsec decrypted traffic is inspected by the firewall E . there is a centralized point for logging and content inspectio

A . running at the same speed B . grounded C . of the same polarity D . in phase

A . gnomonic curve B . small circle C . meridian D . great circle

A、clear B、forceful C、rhythmical D、effective E、emotional

A.The total current flow equals the sum of the individual currents B.The total current flow equals the reciprocal of the sum of the individual currents C.The total resistance equals the sum of the individual resistance D.The total voltage equals the sum of the individual voltages across each resistance

What is the slope of any line parallel to the line 8x+9y=3in the standard (x,y) coordinate plane？ A.-8 B.-8/9 C.8/3 D.3 E.8

A．is halveD B．is doubleD C．quadruples． D．remains the sam E．