Trong bước thực hành quan sát tế bào biểu bì da ếch, theo em, vì sao cần phải nhuộm tế bào biểu bì da ếch bằng xanh methylene?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  My uncle has five hunting dogs, _______________ is ten years old

• Choose the best answer for the following sentence:

  I don't know the reason _____________ she hasn't talked to me recently.

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

  The film was really interesting. They are talking about it.
  
  

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

  Last Sunday I returned to my native village. I was born there.
  
  

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

  stream             spread              heat            teach

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

  splash            shrank              nature              gasoline

• Choose a word that has different stress pattern:

  release              reserve             demand             nuclear

• Choose a word that has different stress pattern:

  infinite             potential               energy              plentiful

• Choose a word that has different stress pattern:

  exhausted             researcher              pollute              windmill

• Choose the best answer for the following sentence:

  He is the only student _____________ the maths problems yesterday.