Cho tứ diện ABCD. Gọi G và E lần lượt là trọng tâm của $∆ABD$ và ABC. Mệnh đề đúng là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose a word that has different stress pattern:

  highlands                     product                  culture                   exist

• Choose a word that has different stress pattern:

  supermarket                        necessity                      development                         traditional

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

  We are happy knowing that you have won a scholarship to study abroad.

• Choose a word that has different stress pattern:

  seriously                        valuable                       technology                      dangerous

• Choose a word that has different stress pattern:

  funeral                    restaurant                      functioning                         interfere

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

  The raise in prices has caused many customers to reconsider unnecessary purchases.

• Choose a word that has different stress pattern:

  request                          airline                         audience                           public

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

  One of the world's best-selling authors, Louis L'Amour is told to have written 101 books, mostly westerns.

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

  phone                        one                       none                       done

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

  switch                    while                         since                     ring