Dòng điện xoay chiều có cường độ . Tần số của dòng điện này là ?       

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  - ________________ attended the performance by the Beatles on August 15, 1965?
  - About 60,000 fans.
   

• Choose the best answer for the following sentence:

  - ____________ to the concert?
  - Only once or twice a year.
  
  

• Choose the word that has the underlined part pronounced differently from the rest:

  music                         electric                             consist                          center

• Choose the word that has the underlined part pronounced differently from the rest:

  heart                           appear                           hear                           beard

• Choose the best answer for the following sentence:

  The pop singer chose a ____________ flight because the show would be on the next day.
   

• Choose the best answer for the following sentence:

  ______________ contrast to classical music, pop music consists of short songs with strong beat and simple tunes.
   

• Choose the best answer for the following sentence:

  Can you play any ___________ instrument?
   

• Choose the best answer for the following sentence:

  - ___________ did the pianist quit his career?
  - Due to a serious injury on his finger.
  
  

• Choose the best answer for the following sentence:

  - ________________ from here to Hawaii?

  - I do not know exactly, but it takes three hours if you go by plane.
  
  

• Choose the best answer for the following sentence:

  - ____________ the pop band stay in our city?
  - About one week.