Khi nói về hệ tuần hoàn ở động vật thân mềm, có bao nhiêu phát biểu sau đây sai?

Máu lưu thông trong hệ mạch kín với áp lực thấp.

Máu có sắc tố hemoxianin.

Máu và nước mô tiếp xúc trực tiếp với các tế bào.

Tim chưa phân hóa.

Giữa động mạch và tĩnh mạch không có mạch nối.  

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 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? 

   

• Choose the best answer for the following sentence:

  ___________ would you like to celebrate your birthday, at the day time or in the evening?  

• Choose the best answer for the following sentence:

  Do you ___________ your birthday cake or do you buy it?
   

• Choose the best answer for the following sentence:

  Last night I _________ to my close friend's birthday party.
   

• Choose the best answer for the following sentence:

  There __________ a lot of fruit and drinks at the party yesterday.
  
  

• Choose the best answer for the following sentence:

  My close friend invited a lot of people _____________ her party.
   

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

  place / Manila / took / Philippines / the 2nd Asian Games / in / from May 1 to May 9, 1954
  
  

• Choose the best answer for the following sentence:

  He doesn't allow us ________________ personal phone calls.