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1/ Hydrocarbon is the most widely popular compound of hydrogen and carbon that exists in nature.
2/ To obtain to derivatives of benzene, carbon atoms can be replaced by other groups of substances.
3/ Raw materials are used for production and to make products.
4/ In chemical industry, the distinction between selling products and the last product is quite difficult.
5/Chemical compound is separated into 2 types: Inorganic compound and Organic compound.
I believe relax activities th best for youth are group activities. They can play a team sport or join a hobby even a volunteer. The first, youth like feeling they are in group. The second,a part of group help youth make friends. More, we make friends with people have the same hobby. For that reasons, I think group actvivtu are the best for youth.
Bạn điền thông tin vào biểu mẫu này nha: https://forms.gle/U1zKa4DXRdQqBNqT7! Ngày khai giảng và 29/7/2021 nhé!
Trong trường hợp này bạn nên đi ngủ để tâm hồn không còn mệt mỏi . Sau khi tỉnh dậy , làm mọi việc suôn sẻ , trôi trảy .
Chúc bạn sớm khỏe lại !
My favorite cat is so I like collecting but their pictures. Cats are an animal that has been around for centuries and is now the most popular pet in the world with more than 600 million animals and countless species. In these cats, each cat has its own behavior, shape and color, but all are very cute.
I began to like collecting pictures of cats about 3 years ago - when I was in 4th grade. Collecting pictures is very simple because when I see beautiful pictures of cats I save on the machine. Then print it out and put it in a notebook - it's called an album. And now I have a beautiful album.
I feel this hobby is very easy and very interesting. In the future, I will continue to do it
Genetically modified mosquitoes drop Zika virus can cause many consequences
The release of genetically modified mosquitoes into the wild to prevent disease spread by mosquitoes, such as Zika virus, malaria, dengue fever is premature and could cause unintended consequences.
This is the warning of the US scientists released on 9/6.
Professor James Collins of Arizona State University, and a co-chairman of the Commission of the national academy of science, engineering and medicine, affirmed should be cautious and conduct more studies of the consequences of social, scientific as well as the release of genetically modified organisms into the environment.
Commission warns on genetically modified technology could cause harmful effects such as reducing the number of other insects, or even more dangerous is the creation of new species capable of rapid spread of disease than.
The researchers called for further studies conducted, the tests in stages and closer collaboration between scientists.
Hello. Yesterday my mother thanks you for instructions. Children and parents were waiting for her. I invited her out the door to take her mother home nursery rhymes.
1. Quoc Tu Giam
2. Nguyen Du
Câu 2 sai rồi nha, phải hỏi là: Nhà văn phổ biến ( nổi tiếng ) ở Việt Nam là ai?
3. Rice
4. Tea
5. Watch TV
1,Temple of Literature
2,To Hoai
3,Pho
4,Tea
5,Watch TV
Chú thích:câu 2 bạn viết sai
Nowadays, the internet has become extremely developed and widespread