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thienphi4v
2 năm trước
Một vật bắt đầu chuyển động dưới tác dụng của 2 lực đồng quy có phương vuông góc F1=3N F2=4N hãy xác định động lượng của vật ở thời điểm 2s Giúpp em vớii
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(extinct ,influence , eacefully , being destroyed ,environment,responsible ,captured ,pollutants , danger, off spring, captured , rapidly , nature , established , natural ) 1. Dinosaurs became _________________ millions of years ago. 2. Human beings are changing the __________________ in all aspects. 3. The chemical _______ from cars and factories make the air, water and soil dangerously dirty. 4. The earth will be a happy planet where human beings, animals and plants ____co-exist. 5. Animals shouldn’t be _______________ for recreation and entertainment. 6. Many species of rare animals are in __________________ of becoming extinct. 7. The place where animals are protected within their natural environment is called a _________. 8. Human beings have a great __________________ on our environment. 9. Many organizations have been set up and funds have been raised. “Set up”means _______________ 10. Wild animals should not be _____________ for recreation and entertainment. 11. The number of rare animals is decreasing _______________. 12. Human beings are ________________ for the changes in the environment. 13. National Parks are established to create the environment for rare animals to survive and produce _________________. 14. By cutting down trees, we are changing the __________________ habitat of birds and animals 15. All national parks are in danger of __________________.

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