Bạn chưa đăng nhập. Vui lòng đăng nhập để hỏi bài

Những câu hỏi liên quan
Hồng anh Phan
Xem chi tiết
Song Ngư
Xem chi tiết
Harley Quinn
4 tháng 5 2018 lúc 21:53

1.Teaching robots can teach us maths and english
2.Tea is the most popular drink in Britain
3.We visited our granhparents in the countryside last week
4.Recycling from used materials creates new products

Nguyễn Thị Thuỳ Dương
5 tháng 5 2018 lúc 22:06

1. Teaching robots can teach us Math and English.

2. Tea is the most popular drink in Britain .

3. We visited our grandparents in the countryside last week.

4. Recycling from used materials creates new products

hahahaha

Thu Tran
Xem chi tiết
Xuân Dinh
4 tháng 5 2018 lúc 20:56

Giup mik nha mai nop roi!

1.Rearrange these words to make meaningful sentences:

1.want/If/to/you/reduce/the/at home/rubbish/will/what/do/you/?

........If you want to reduce the rubbish at home, what will you do?.....

2.robots/Teaching/English/teach/can/us/Maths/and.

.....Teaching robots can teach us Math and English ...........

3.Recycling/new/creates/products/used materials/from/.

......Recycling from used materials creates new products ...........

4.is/the/Tea/most/drink/in/popular/Britain/.

........Tea is the most popular drink in Britain .....

2.Finish each of the following sentences in such a way that it means exactly the same as the sentences:

1.Lan was sick,so she didn't go to school.

->Because.....Lan was sick, she didn't go to school .....

2.Nobody in my family is older than my grandmother.

->My grandmother.....is the oldest person in my family .......

3.We started learning Enghlish when we were in grade 3.

->We.....have learned English .......since....we were in grade 3 ....

3.Make the question for the underlined parts

1.He gets up at 6.00 very morning.

...What time does he get up every morning?.....

2.They go to the library twice a week.

.....How often do they go to the library?.....

3.He should wash his hands before meals

..........What should he do before meals?........

Dương Minh
Xem chi tiết
Nguyen Hoang Hai
9 tháng 4 2019 lúc 7:03

Đáp án:  C

Toàn Bùi ngọc
5 tháng 4 2023 lúc 19:37

c

 

Trần Việt Anh
10 tháng 1 lúc 20:35

C

Nguyễn Minh Đức
Xem chi tiết
ʚƒɾҽҽժօʍɞ
20 tháng 4 2022 lúc 20:11

1C

2F

3A

4E

5B

6D

Dang Van An
Xem chi tiết
An Trần
20 tháng 10 2018 lúc 21:03

Help me

PAPER RECYCLING

A Paper is different from other waste produce because it comes from a sustainable resource: trees. Unlike the minerals and oil used to make plastics and metals, trees are replaceable. Paper is also biodegradable, so it does not pose as much threat to the environment when it is discarded. While 45 out of every 100 tonnes of wood fibre used to make paper in Australia comes from waste paper, the rest comes directly from virgin fibre from forests and plantations. By world standards, this is a good performance since the worldwide average is 33 percent waste paper. Governments have encouraged waste paper collection and sorting schemes and at the same time, the paper industry has responded by developing new recycling technologies that have paved the way for even greater utilization of used fibre. As a result, industry’s use of recycled fibres is expected to increase at twice the rate of virgin fibre over the coming years.

B Already, waste paper constitutes 70% of paper used for packaging and advances in the technology required to remove ink from the paper have allowed a higher recycled content in newsprint and writing paper. To achieve the benefits of recycling, the community must also contribute. We need to accept a change in the quality of paper products; for example, stationery may be less white and of a rougher texture. There also needs to support from the community for waste paper collection programs. Not only do we need to make the paper available to collectors but it also needs to be separated into different types and sorted from contaminants such as staples, paperclips, string and other miscellaneous items.

C There are technical limitations to the amount of paper which can be recycled and some paper products cannot be collected for re-use. These include paper in the form of books and permanent records, photographic paper and paper which is badly contaminated. The four most common sources of paper for recycling are factories and retail stores which gather large amounts of packaging material in which goods are delivered, also offices which have unwanted business documents and computer output, paper converters and printers and lastly households which discard newspapers and packaging material. The paper manufacturer pays a price for the paper and may also incur the collection cost.

D Once collected, the paper has to be sorted by hand by people trained to recognise various types of paper. This is necessary because some types of paper can only be made from particular kinds of recycled fibre. The sorted paper then has to be repulped or mixed with water and broken down into its individual fibres. This mixture is called stock and may contain a wide variety of contaminating materials, particularly if it is made from mixed waste paper which has had little sorting. Various machineries are used to remove other materials from the stock. After passing through the repulping process, the fibres from printed waste paper are grey in colour because the printing ink has soaked into the individual fibres. This recycled material can only be used in products where the grey colour does not matter, such as cardboard boxes but if the grey colour is not acceptable, the fibres must be de-inked. This involves adding chemicals such as caustic soda or other alkalis, soaps and detergents, water-hardening agents such as calcium chloride, frothing agents and bleaching agents. Before the recycled fibres can be made into paper they must be refined or treated in such a way that they bond together.

E Most paper products must contain some virgin fibre as well as recycled fibres and unlike glass, paper cannot be recycled indefinitely. Most paper is down-cycled which means that a product made from recycled paper is of an inferior quality to the original paper. Recycling paper is beneficial in that it saves some of the energy, labour and capital that go into producing virgin pulp. However, recycling requires the use of fossil fuel, a non-renewable energy source, to collect the waste paper from the community and to process it to produce new paper. And the recycling process still creates emissions which require treatment before they can be disposed of safely. Nevertheless, paper recycling is an important economical and environmental practice but one which must be carried out in a rational and viable manner for it to be useful to both industry and the community.

i. Process of paper recycling

ii. Less threat of waste paper to the environment

iii. Collection of paper for recycling

iv. Sources of paper for recycling

v. Bad sides of paper recycling

vi. Contribution of community to recycling paper

Your answer:

1. Paragraph A ...........iii. Collection of paper for recycling............

2. Paragraph B ..........vi. Contribution of community to recycling paper.............

3. Paragraph C ...........iv. Sources of paper for recycling............

4. Paragraph D ............i. Process of paper recycling...........

5. Paragraph E ...........v. Bad sides of paper recycling............

Dang Van An
Xem chi tiết
đức đào
Xem chi tiết
Yoom Surber
13 tháng 12 2019 lúc 9:06

1. His parents haven't decided tho to consult to deal with their son's problem. 
2. The prospect of moving to a new flat on the outskirts of Ha Noi cheered me up. 
3. We changed the design of our traditional products to attract more customers. 
4. The school facilities have been improved a lot within the last three years. 

Khách vãng lai đã xóa
tranthuylinh
Xem chi tiết
Khinh Yên
11 tháng 7 2021 lúc 16:04

Plastic is used to make many (1) …………products  ……… today. The first man-made plastic, called (2) ……… Parkesine…………, was created from plant material in 1862. However, it was too (3) ……… expensive………… to make. In 1866, John Wesley Hyatt invented (4) …………Celluloid  ……… He was trying to find a(n) (5) …………substitute……… for ivory, which was used to make billiard balls. Bakelite was (6) ……invented…………… in 1909. It was the first plastic to be made entirely from (7) ……artificial  ………… materials. Today, most plastic is made from (8) …………petroleum  ……… (9) ………unfortunately  …………, this is bad for the (10) ………… environment  ……… Therefore, people are still looking for alternatives.

Đỗ Thanh Hải
11 tháng 7 2021 lúc 16:05

1 products

2 Parkesine

3 expensive

4 Celluloid

5 substitute

6 invented

7 artificial

8 petroleum 

9 unfortunately 

10 environment