Một bóng đèn được thắp sáng ở hiệu điện thế U =120 V có công suất là P1. P2 là công suất của đèn khi được thắp sáng ở hiệu điện thế U = 110 V thì

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  "I didn’t go to class last night because my car broke down.” “You ____________ mine. I wasn’t using it.”
  

• Choose a word that has different stress pattern:

  hospital                 mischievous                   supportive                 special

• Choose a word that has different stress pattern:

  family                 whenever                   obedient                 solution

• Choose a word that has different stress pattern:

  biologist               generally              responsible               security

• Choose a word that has different stress pattern:

  confident                important                  together                  exciting

• Choose a word that has different stress pattern:

  possible                university               secondary                suitable

• Choose one sentence that has the same meaning to the root one:

  They are not allowed to go out in the evening by their parents.
  
  

• Choose one sentence that has the same meaning to the root one:

  Although my parents are busy at work, they try to find time for their children.
  
  

• Choose one sentence that has the same meaning to the root one:

  His eel soup is better than any other soups I have ever eaten.
  
  

• Choose one sentence that has the same meaning to the root one:

  She gets up early to prepare breakfast so that her children can come to school on time.