Hình dạng của phân tử CH₄, H₂O, BF₃ và BeH₂ tương ứng là :

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  ____________ I was working as well as studying.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  Elisa said to her friend that she was going to the countryside next week.

• Find a mistake in the four underlined parts of the sentence and correct it:

  He asked me if they understood what I had said to them.

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

  “Why don’t you invite Mary to your birthday party, Jane?” said Tom.
  
  

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

  “Don’t forget to give me a ring at 10 o’clock tonight,” said Trung.
  
  

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

  “What shall I do if the car won’t start?” she said.
  
  

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

  Mark invited Sam to the cinema.
  
  

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

  “Please don’t smoke in these seats,” the waitress said to tne passengers.
  
  

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

  secondary                      end                       system                        level

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

  break                       meaning                         least                        reading