So sánh tốc độ của 2 phản ứng sau (thực hiện ở cùng nhiệt độ) : Zn (bột) + dung dịch CuSO₄ 1M (1) Zn (hạt) + dung dịch CuSO₄ 1M (2) Kết quả thu được là :

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  The last time I visited the museum was a year ago.

   

   

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

  when / Mary / my / we / were / friend / used / she / to / help / is / me / with 

  / best / homework / at / who / school

   

• Choose a word that has different stress pattern:

  nervous             wonsder              belong                quiet

• Choose a word that has different stress pattern:

  uncomfortable             conversation             embarrassing           experience

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

  passed             treated            hoped              noticed

• Choose the best answer for the following sentence:

  I have invited some friends to our house for _____________________________ dinner.

• Choose the best answer for the following sentence:

  My most ___________________________ moment was trying to introduce a woman whose name I couldn't remember.

• Choose the best answer for the following sentence:

  She ______________________ to get her breath back and then carried on jogging.

    

• Choose the best answer for the following sentence:

  The more they tried to get her to talk about her experiences, the further she

  retreated back into her __________________________ .

    

• Choose the best answer for the following sentence: 

  The manager  _________________________ and ______________________ you in a few minutes.