In a modern three-phase A-Csynchronous brushless generator, the excitation winding is on the rotorThat means （）.
1、In modern linguistics, speech is regar
In modern linguistics, speech is regarded as more basic than writing, because （）Ain linguistic evolution, speech is prior to writingBspeech pla...
2、In modern installations, the main engi
In modern installations, the main engine and the standby auxiliary engines（）Acan be started at low temperature and are free from preheatingBusu...
3、The output voltage of a three-phase al
The output voltage of a three-phase alternator is regulated by the （）.AAC voltage to the armatureBAC voltage to the fieldCDC voltage to the armatureDDC voltage to the field
4、In modern logistics, the goods transfe
In modern logistics, the goods transfer starts with packaging, followed by （） storage and distribution.AProductionBTransportationCPlanningDDelivery
5、In modern fathometers the sonic or ult
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.AtransmitterBtransducerCtransceiverDamplifier
6、The modern languages Harvard taught in
The modern languages Harvard taught in 1825 were______.A Latin and GreekB Latin, Green, French and GermanC American history and GermanD French and German