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Học tại trường Chưa có thông tin
Đến từ Chưa có thông tin , Chưa có thông tin
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Người theo dõi (2)

vân anh
vân anh
Hồ Hoàng Khánh Linh
Hồ Hoàng Khánh Linh

Đang theo dõi (1)

Đỗ Tuệ Lâm
Đỗ Tuệ Lâm

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giúp tớ vssss
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Everything

Wake

Are

With

on

Would

They

Plays

what

Out

Nowadays Social Media (21)__ an important role in our life, we are using it to keep in touch (22) ___ our friends and make some new friends. Besides that we want to show the world (23)__ we are doing by means of posting pictures or videos. These tools are all very useful, but do (24) __ control our life too much? A few years ago Social Media wasn’t that big yet, but nowadays people are able to use it for almost, anything in their daily life. Why (25___ people buy CD’s when we have You tube? Why would people buy newspapers when we have Facebook and Twitter? When you just wake up and open your eyes, you don’t have to go (26) ___of bed to see what’s going (27)___ in the rest of the world. (28)__ looks and feels easier to do with social media.
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List of Headingsi. Where the harmful particles come fromii. The problem of fire ironed outiii. Carbonex is idea for factoriesiv. Carbonex works with more than one fossil fuel v. Problems with fossil fuelvi. Alternative energyvii. It is a two-way processviii. Iron is the bestix. Engine power vs. clean emissionsx. Greenhouse effect and global warmingxi. The side- effect of one solutionxii Increase engine efficiency - how it works.The problem of fire Ironed OutIt has been quite a while since man discovered fire. But it is only recently that he has learnt enough chemistry to think of improving it. Take fossil fuels, suchas coal and oil, for example. They give off plenty of heat when they burn ;unfortunately, they give off plenty of other things as well, including the particlesthat make up smog and soot, the carbon dioxide responsible for the greenhouseeffect and the oxides of nitrogen and sculpture that help to made acid rain. A newfuel additive called Carbonex seems drastically to reduce emissions of particles andof nitrogen oxides. It may thus help to solve half the problems.To understand the solution, take a closer look at the problem. Fossil fuelsare mostly made of carbon, which reacts with oxygen to produce carbon dioxide (inthe case of coal) or carbon dioxide and water (on the case of petrol, diesel fuel andother refined oils). The combustion of fossil fuels is8never quite complete. Small, unburnt particles of fuel always escape, often as blacksmoke. These particles contain cancer- causing chemicals and are ever moreunpopular.There is a standard fix for this. To reduce the problem of incompleteburning, combustion chambers are routinely flooded with about 25% more air thanthey need to burn their fuel. The idea is to give the flame more oxygen and hence,increase the efficiency of burning. But there is a snag. Dry air is 21% oxygen and78% nitrogen. Nitrogen, like carbon, reacts with oxygen at high temperature—in this case producing the nitrogen oxides (NOX) that help cause aid rain. Whenextra air is added to a combustion chamber, emissions of soot and smog go downbut NOX emissions go up. Carbonex, invented by an academic chemist, Dr. DavidFarrar. At the university of Toronto, and developed by Velino Ventures of Toronto,tries to alleviate this. The active ingredient is a hydrocarbon molecule to which aniron atom is bound. The molecule acts as a carrier for the iron, letting it dissolve in. Paragraph A 2. Paragraph B Paragraph C 3. Paragraph D 4. Paragraph E 5. Paragraph F Paragraph G Paragraph H………………………….………………………….…………xi………….… ………………………….………………………….………………………….…………iv……….…… …………iii..………….
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WORD FORM

New Zealand's native-bird body odour is so strong, it's alerting predators to the birds' (0) ...ongoing research shows. The smells may drive some species to (1) ...Many bird scents stem from a gland that produces waxes (2) ...to keeping feathers healthy. In Europe and the Americas, birds' bodies alter this wax during the (3) ...season. During this period the wax's (4) ...changes in a way that reduces smells and keeps the birds' nests less (5) ...by predators that use their noses to find food. Native New Zealand birds did not do this and their smells are remarkably (6) ... Scientists say they have (7) ... that New Zealand's birds may be so pungent largely because they were able to get away with it for so long. Native birds never had to mask their scents to improve their (8) ...chances. But things eventually changed when rats and cats were introduced into the islands. (9) ...of the nests was easy for animals with such good noses. Now many Native New Zealand birds are listed as (10) ...byconservation organisations. One solution might be to put some kind of deodorant into the smelly nests in order to prevent predators finding them.

0 - PRESENT 1 - EXTINCT 2 - ESSENCE 3 - BREED 4 - COMPOSE 5 - DETECT 6 - PLEASE 7 - SUSPECT 8 - SURVIVE 9 - COVER 10 - THREAT  
  GIÚP TỚ VỚI Ạ
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It should be ... that students are expected to attend classes regularly.

A. marked

B. reminded

C. perceived

D. noted

  
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Chủ đề:

Nghị luận về một vấn đề tư tưởng, đạo lí

Câu hỏi:

giải thích luận điểm :người có lòng kiên trì sẽ luôn luôn được mọi người yêu quý và kính trọng

giúp tớ vớiii
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