Cho hình lập phương ABCD. EFGH. Hãy xác định góc giữa cặp vectơ $\overrightarrow{AB}$ và $\overrightarrow{DH}$?

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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:

  ethnic                whether                 although               other

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

  popular                    important                     psychology                        speaking

• Choose a word that has different stress pattern:

  prosperous                      capital                       industrial                 history

• Choose a word that has different stress pattern:

  modern            rural                      filthy                  transform

• Choose a word that has different stress pattern:

  century                   develop                     social                      history

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

  method                filthy                  within                     twentieth

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

  transformed                moved              earned               invented

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

  about                   plough                 cough                    shout

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

  waste                taste            station               statue

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

  bury             carry             heavy                many