Cho các phát biểu sau:

(a) Vỏ bánh mì khi ăn sẽ ngọt hơn ruột bánh mì.

(b) Có thể phân biệt len (lông cừu) và “len” (tơ nitron) bằng cách đốt.

(c) Để hạn chế vị tanh của cá, khi nấu canh cá người ta nấu với các loại có vị chua như me, sấu, khế...

(d) Thành phần chủ yếu của khí biogas là metan.

(e) Tơ tằm là một loại protein đơn giản.

(g) Dầu mỡ để lâu trong không khí bị ôi thiu do liên kết đôi C=C bị oxi hoá bởi oxi không khí..

Số phát biểu đúng 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:

  pasture             acquaintance              constant               talkative

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

  uncertain               tell                pursuit                picture

• Choose the best answer for the following sentence:

  My friend often shows her ______________ whenever I have troubles.
   

• Choose the best answer for the following sentence:

  Daisy is so ____________. She only cares about herself, not about other people.
   

• Choose the best answer for the following sentence:

  John left a _______________ impression on me. I will never forget him.
  
  

• Choose the best answer for the following sentence:

  Two friends should be loyal _____________ each other.
   

• Choose the best answer for the following sentence:

  The teacher never lets us ______________out when _______________.
   

• Choose the best answer for the following sentence:

  Whenever I see an action film, I feel my heart ______________ strongly.
  
  

• Choose the best answer for the following sentence:

  He was the first _____________ the fire.
  
  

• Choose the best answer for the following sentence:

  He is _____________ everybody in my class likes him.