Cho hình chóp đều S ABCD . có cạnh đáy bằng 2a cạnh bên bằng 3a. Khoảng cách từ A đến  bằng        

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Một số câu hỏi khác có thể bạn quan tâm.

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

   excuse                  socialc                  carry               culture

• Choose the best answer for the following sentence:

   We have to buy more food in _______________ for some unexpected guests.

   

• Choose the best answer for the following sentence:

   He’s always been very ________________ to me.

   

• Choose the best answer for the following sentence:

   Attending parties is one of the good chances to _______________ with other people.

   

• Find a mistake in the four underlined parts of the sentence and correct it:

  The beach on where we used to lie for sunbathing is very nice and clean.

• Choose the best answer for the following sentence:

  Peter suggested __________ out for a drink but everybody refused and kep

  on _________ .

    

• Find a mistake in the four underlined parts of the sentence and correct it:

  The storm N°9, for which we are waiting, have changed its direction.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The man with whom my sister is married is a doctor.

• Choose the best answer for the following sentence:

  Her friends suggested that Mary _____________ a buffet for her birthday party.

   

• Choose the best answer for the following sentence:

  Working here requires employees _____________ good at English and computer