Nitro hoá benzen bằng $HN{O}_3 đặc/H_{2}S{O}_4$ đặc ở nhiệt độ cao nhận được sản phẩm nào là chủ yếu?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  I wasn't a serious accident. Only the car was badly ____________.
   

• Choose the best answer for the following sentence:

  When I returned home after 20 years, everything ____________completely.
  
  

• Choose the best answer for the following sentence:

  _____________ do teenagers in your country give their friends on their birthday?
   

• Choose the best answer for the following sentence:

  Do your parents celebrate _____________ wedding anniversary each year?
   

• Choose the best answer for the following sentence:

  How _________ have your parents been married?
   

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

  By contrast / the share / oil in total energy consumption / decrease / 95 percent / 80 percent / the same period
  
  

• Choose the best answer for the following sentence:

  What do people ___________ the 25^th wedding anniversary? Is it "silver anniversary"?
   

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

  The station will be closed for some days because they are replacing the escalators.
  
  

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

  That woman wrote to me so that I gave her some advice.
  
  

• Choose the best answer for the following sentence:

  Do you ___________ your birthday each year?