Cho dãy các chất rắn: Al, NaHCO₃, Na₂CO₃, Al(OH)₃. Số chất trong dãy có tính lưỡng tính là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the correct sentence which is built from the words and phrases given:

  I / write / give you directions / my house / I also enclose a map
  
  

• Choose the correct sentence which is built from the words and phrases given:

  you / come out of / bus stop, turn right / keep walking / go over a bridge.
  
  

• Choose a word that has different stress pattern:

  football                     between                       captain                     friendly

• Choose a word that has different stress pattern:

  volunteer                    participate                     Vietnamese                  introduce

• Choose the correct sentence which is built from the words and phrases given:

  My house / next to / post office / you / not miss it.
  
  

• Choose a word that has different stress pattern:

  involve                  honour                     final                     nation

• Choose a word that has different stress pattern:

  event                     compete                     series                  attract

• Choose one sentence that has the same meaning as the root one:

  It won't rain tomorrow.
  
  

• Choose one sentence that has the same meaning as the root one:

  He's going to take your life one day.
  
  

• Choose one sentence that has the same meaning as the root one:

  Have you enough money to pay for all these things?