Hoạt động nào dưới đây gây ô nhiễm môi trường?

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Một số câu hỏi khác có thể bạn quan tâm.

• Phát biểu nào sau đây không đúng với vị trí của kênh đào Pa-na-ma?

• The singer was _____ on the piano by her sister.

• I won't lend you this money_____ you promise to pay it back.

• Đăng kí nghĩa vụ quân sự khi đến tuổi là thực hiệ trách nhiệm
  
• Read the passage and choose the correct answer:
  In the last 100 years technology has completely changed the way we live. At the touch of a button, we can look up almost anything we need to know on the Internet. We have electricity, aero planes. television, and we have ever been to the moon. So what sort of inventions will there be in the 21st century? Indeed, is there anything important still left to invent?
  It seems that there is. Scientists all over the world are looking into nano- technology with a great deal of interest. This is the science of building small machines - and when we say small, we mean very small. To give you an idea of the size scientists are talking about, these machines would be about a million billion times smaller than the smallest bit of dust.
  Nano- technology will bring about enormous changes. Doctors, for example, will be able to cure any illness. The environment will be improved because it will be possible to take the polluted air we breathe and make it clean again. But perhaps the most exciting thought of all is that we won't have to wait a thousand years for Nan technology - many people believe there is a good chance it will come in our lifetime.
  Question. Which change will Nano technology not bring about?
  

• I’d rather you______ home now.

• Khi một xe buýt tăng tốc đột ngột thì các hành khách:
  
• Cơ quan nào dưới đây đưa ra những quyết định cơ bản của EU?
  

• Tìm tất cả các giá trị thực của tham số m để hàm số  đạt cực đại tại  ?  

• Phát biểu nào sau đây về sóng cơ là không đúng?