Trong không gian $Oxyz$ , cho điểm $A\left(2;1;3\right),B\left(0;3;1\right)$ . Trung điểm $AB$ có tọa độ là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  She is _____________ a novelist.
  
  

• Choose the best answer for the following sentence:

  Los Angeles and San Francisco are ____________ on the West Coast.
  
  

• Choose the best answer for the following sentence:

  There were ___________ a thousand people there buying tickets.
  
  

• Choose the best answer for the following sentence:

  It was _____________ I expected.
  
  
  

• Choose a word that has different stress pattern:

  neighbor                   extend                   resource                  comprise

• Choose the best answer for the following sentence:

  It was Ptolemy, a / an ______________, who propounded that the Earth was the center of the universe.

• Choose the best answer for the following sentence:

  The area ____________ New York to the south of Houston Street is known as Soho.

• Choose the best answer for the following sentence:

  England used to be the first ____________ country in Europe as well as in the world.

• Choose the best answer for the following sentence:

  The state is at least ___________ England.
  
  

• Choose the best answer for the following sentence:

  ______________ live in the capital than in the whole of the rest of the country.