Khi nhúng thanh Zn vào dung dịch (l), sau một thời gian phản ứng, nhỏ thêm vài giọt dung dịch . Hiện tượng quan sát được là?         

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  TV is a bit expensive; we should buy a radio because it is ____________.
   

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

  love                  come                   some                       jog

• Choose the best answer for the following sentence:

  Can you bring the washing in if it _________?
   

• Choose the best answer for the following sentence:

  Tam: “Why is she angry with you?”

  Hoa: “Because I don’t remember that she _____________ me to finish the work before 10.00 a.m.”
  
  

• Choose the best answer for the following sentence:

  What _____________ happen if she refuses our invitation?
   

• Choose a word that has different stress pattern:

  realize                    family                    continue                       proper

• Choose a word that has different stress pattern:

  consuming                  develop                  prevention                 effort

• Choose the best answer for the following sentence:

  Thanh is sad because she thought I knew she _____________ ill last week but I didn't come to visit her.
   

• Choose a word that has different stress pattern:

  opposition                    difference                    information                    demonstration

• Choose the best answer for the following sentence:

  She said that she could not help you because she _____________ too much to do.