Trong các số phức  có bao nhiêu số là số thuần ảo?

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Một số câu hỏi khác có thể bạn quan tâm.

• Blacken the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  They will build a new house in our town.           

• Blacken the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:  

  “Listen carefully”, he said.         

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  There were so many people on the train that Mary couldn’t get a seat.         

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

  “I’ll speak calmly. I really will!”, he said.         

• Mark the letter A,B,C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  If I didn’t have a car, I’d have to walk five blocks to work every day.           

• Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions:

  “Why didn’t you answer my phone last night?” he said.         

• Mark a letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions:

  The hurricane destroyed hundreds of buildings in the city.         

• Mark a letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions:

  WHO means World Health Organization.           

• Mark a letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions:

  Life on earth will be destroyed if people keep cutting trees for their own benefits.         

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  No one has seen Linda since the day of the party.