Tất cả các giá trị của để phương trình có đúng nghiệm là:         

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  attend                    decent                      acceptable                     expression

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

  thing                      length                      either                          author

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

   look                  school                        good                        wool

• Choose a word that has different stress pattern:

  discuss                  visit                     begin                 respond

• Choose a word that has different stress pattern:

  signal                     sentence                      instance                   police

• Choose a word that has different stress pattern:

  raincoat                  homesick                  downstairs                      airport

• Choose a word that has different stress pattern:

  eighteen                     eighty                   hundred                      thousand

• Choose a word that has different stress pattern:

  English                  Chinese                    German                Austrian 

• Choose the best answer for the following sentence:

  Sally asked me if they __________ on time.
  
  

• Choose the best answer for the following sentence:

  The lifeguard told us _______ when the red flag was flying.