A box coutains 15 identical reams paper. The total mass of the box with 1/5of all the reams of paper. The mass of the emty box is 2/7 of a reams of paper . What í the mass of the emty box
K
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TG
1 tháng 11 2016
9.Young male average weight is 47 kg + (47-39) = 55 kg
10. The minimum value is 800 001
KY
31 tháng 12 2021
Paper was ______invented ____ (1) by the Chinese in the first century A.D. The art of papermaking took 700 years to reach the Muslim world and another 700 years to get to Britain.
Most paper ____is______ (2) made from wood. When the trees are cut down, they are carried by land or water to paper mills. Here they are cut up and the wood is _____broken_____ (3) up into fibers, mixed with water and chemicals. This wood pulp is then dried up on a machine and made into paper.
Papermaking is an important British industry, and paper from Britain is ____exported______ (4) to South Africa, Australia and many other countries. Some of the wood used in British _____papermaking_____ (5) industry comes from trees grown in Britain, but wood is also imported from other countries such as Norway. One tree is needed for every 400 copies of a forty-page newspaper. If half the adults in Britain each day buy one daily paper, this uses up over 40,000 trees a day. Trees are cut down faster than they can be replaced, so there may be a paper _______shortage___ (6) before the year 2020.
Answer the questions:
1.Who was paper invented by?
-> …………………………………… Paper was invented by the Chinese…………………………………………
2.What is paper made from?
-> ……………………………… Most paper is made from wood…………………………………………………………
3.Where is paper from Britain exported to?
-> ………………………………… South Africa, Australia and many other countries……………………………………………………
4.What is the passage about?
-> …………………………Papermaking………………………………………………………………
MH
31 tháng 12 2021
1. invented
2.is
3.broken
4.exported
5.papermaking
6.shortage
1.Who was paper invented by?
Paper was invented by the Chinese
2.What is paper made from?
Paper is made from wood.
3.Where is paper from Britain exported to?
Paper from Britain is exported to South Africa, Australia and many other countries
4.What is the passage about?
The passage is about papermaking.
TG
12 tháng 11 2016
Google dịch :
"Khối lượng trung bình của một nhóm trẻ em là 47kg. Nếu 5/13 của số trẻ em là con gái và khối lượng trung bình của họ là 39kg. Tìm khối lượng trung bình của các chàng trai.
Trả lời: Khối lượng trung bình của các chàng trai là kg
Câu hỏi tương tự Đọc thêm"
Góp ý với bạn nên viết đề bằng Tiếng Việt
12 tháng 12 2016
dịch: khối lượng trung bình của một nhóm trẻ em là 47kg. Nếu số lượng trẻ em là con gái và khối lượng trung bình của họ là 39kg. Tìm khối lượng trung bình của các chàng trai.
dap so ra 52
k mik nha
LH
1
26 tháng 6 2018
Đáp án A.
Key words: Brownian movement
Clue: The first one provided a theory explaining Brownian movement, the zig-zag motion of microscopic particles in suspension: Người đầu tiên đưa ra một học thuyết giải thích sự vận động Brownian, sự chuyển động theo đường zigzag của các hạt vi mô trong hệ thống treo.
Dễ thấy đáp án đúng là A. The zig-zag motion of microscopic particles in suspension.
O
2 tháng 2 2018
Read the passage, then answer the questions.
Every day of the year throughout the world, about twenty million paper bags and newspapers are screwed and thrown away
Making paper requires a lot of wood pulp and the work of million of workers. Many countries have had plans to recycle waste paper to save money and labor. In countries where there is the cooperation of the public, paper mills recycle as much as sixty percent of waste paper. Their simple work is to take away the ink, crush it and make it into pulp again. For every ton of recycled newsprint, twelve trees can be saved. We can insist that the more paper people save, the more trees are preserved.
l. How many paper bags and newspapers are thrown away every day?
=> Every day of the year throughout the world, about twenty million paper bags and newspapers are screwed and thrown away.
2. What material do paper mills need to make paper?
=> Making paper requires a lot of wood pulp and the work of million of workers. .
3. What have many countries done to save money and labor in making paper?
=> Many countries have had plans to recycle waste paper to save money and labor.
4. What percentage of waste paper is recycled with the help of the public?
=> In countries where there is the cooperation of the public, paper mills recycle as much as sixty percent of waste paper.
5. What do the paper mills do to reuse waste paper?
=> Their simple work is to take away the ink, crush it and make it into pulp again.
6. How many trees can be saved for every ton of recycled newsprint?
=> For every ton of recycled newsprint, twelve trees can be saved.
DT
Đỗ Thanh Hải
CTVVIP
9 tháng 6 2021
1 like
2 miles
3 of
4 amounts
5 about
6 surface
7 more
8 some
9 due to
10 depth
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