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As stated in paragraph 2, most talent show contestants and video bloggers __________
Tháng Tám 16, 2023
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Vở thực hành Toán 7 Bài 36 (Kết nối tri thức): Hình hộp chữ nhật và hình lập phương
Tháng Mười 17, 2023
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Trong các mệnh đề sau, mệnh đề nào có mệnh đề đảo đúng?
Tháng Tám 18, 2023
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 20 to 26. Traveling around Thailand in the 1990s, William Janssen was impressed with the basic rooftop solar heating systems that were on many homes, where energy from the sun was absorbed by a plate and then used to heat water for the home. Two decades later Janssen developed that basic idea he saw in south-east Asia into a portable device that uses the power from the sun to purify water. The Desolenator unit operates as a mobile desalination unit that can take water from different places, such as the sea, rivers, boreholes, and rain, and purify it for human consumption. It is particularly valuable in regions where natural groundwater has been tarnished, or where seawater is the only water source available. Janssen saw that there was a need for a sustainable way to clean water for both the developing and the developed countries when he moved to the United Arab Emirates and saw large-scale water processing. The Desolenator can produce 15 liters of drinking water per day, enough to sustain a family for cooking and drinking. Its main selling point is that unlike standard desalination techniques, it doesn’t require a generated power supply; just sunlight. It measures 120 cm by 90 cm, and it’s easy to transport, thanks to its two wheels. Water enters through a pipe and flows as a thin film between a sheet of double glazing and the surface of a solar panel, where it is heated by the sun. The warm water flows into a small boiler (heated by a solar-powered battery) where it is converted to steam. When the steam cools, it becomes distilled water. The device has a very simple filter to trap particles, and this can easily be shaken to remove them. A recent analysis found that at least two- thirds of the world’s population lives with severe water scarcity for at least a month every year. Janssen says that by 2030 half of the world’s population will be living with water stress – where the demand exceeds the supply over a certain period of time. It is really important that a sustainable solution is brought to the market that is able to help these people,’ he says. ‘Many countries don’t have the money for desalination plants, which are very expensive to build. They don’t have the money to operate them, they are very maintenance intensive, and they don’t have the money to buy the diesel to run the desalination plants, so it is a really bad situation.” (Adapted from Cambridge English IELTS Academic 15 by Cambridge University Press) Which best serves as the title for the passage?
Tháng Chín 4, 2023
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Lý thuyết Định lí Thalès trong tam giác (Kết nối tri thức 2023) hay, chi tiết | Lý thuyết Toán lớp 8
Tháng Tám 7, 2023
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. When corals are mentioned, many people think of rock-life forms in the sea filled with colorful fish. But corals are made up of hundreds of thousands of small organisms which live and feed like any other sea life. For the past five years, researchers in Hawaii and Australia have been engineering corals inside a lab to see if they could better resist the effects of climate change. They say it is now time to see how their creations perform in nature. The scientists say climate change linked to human causes has led to warming oceans that can harm sea life. They say if the more heat-resistant corals they developed do well in the ocean, the method can be used to help save suffering and dying reefs. The team tested three methods for making corals that would be strong and healthy in nature. One was the method of selective breeding. This method involves choosing parents with desirable characteristics for reproductive purposes. A second method subjected the corals to increase temperatures to condition them to be able to survive in warm ocean environments. The third involved making changes to the algae that provide corals with necessary nutrients. The leader of the project, University of Hawaii researcher Kira Hughes, said all the methods proved successful in the lab. She told The Associated Press that some scientists might worry that such methods go against the natural processes of nature. But with the planet continuing to warm more and more, she does not see any better options. "We have to intervene in order to make a change for coral reefs to survive into the future," Hughes said. When ocean temperatures rise, corals release algae that supplies nutrients and gives them color. This causes them to turn white, a process called bleaching. When this happens, corals can quickly become sick and die. But for years, scientists have been observing corals that have survived bleaching, even when others have died on the same reef. They are now focusing on those healthy survivors and hoping to further increase their resistance to heat. Those corals were used as the parents for the newly created kinds. (https://eamingenglish.voanews.com) What is the main idea of the passage? – Question and Answer English online
Tháng Chín 15, 2023
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