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Оксид алюминия обладает:
А)Основными свойствами
Б)Кислотными свойствами
В)Амфотерными свойствами
Г) это несолеобразующий оксид.-
Предмет:
Химия -
Автор:
cobwebfuller - 5 лет назад
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Ответы 1
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Al2О3 обладает амфотерными свойствами
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Автор:
garymalone - 5 лет назад
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в каком предложении подлежащиее выражено прилагательным ,срочнооооо умоляяяю
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Русский язык -
Автор:
kingqbrp - 5 лет назад
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Помогите пожалуйста!
1. Blasts, Bursts and Flashes
2. Check Those Figures
3. A Great Echelon of Birds
4. Control yourself
5. You’re feeling better
6. Flying Times
7. Penguin in a Coal Mine
8. Fatal attraction
A Hypnosis is commonly thought of as a parlor trick, but it has some uses in treating medical conditions. One such sickness is irritable bowel syndrome. The ailment troubles up to 58 million Americans, causing abdominal pain, bloating, constipation and diarrhea. Special diets and drug therapies often fail to work well. Nearly 20 years ago researchers first tried hypnotherapy for the disorder. More recently, British researchers followed 204 patients for up to six years and found that 12 weekly one-hour hypnotherapy sessions significantly improved symptoms 71 percent of the time.
B Astronomers long suspected that bursts of gamma rays were related to exploding stars but remained unsure how to categorize the events with respect to other celestial blasts. A gamma- ray burst that reached the earth on March 29, 2003, however, suggests that most such occurrences are produced by the same type of cosmic blast. The burst, the closest ever recorded—at 2.6 billion lightyears— enabled astronomers to measure in detail the energy produced. A comparison to previous bursts, x-ray flashes and rare, type Ic supernovae revealed that such events release nearly the same amount of energy (roughly equal to that produced by the sun in its lifetime).
C There are various warning signs but so far few cases in which a mismatch caused by climate change has actually had a serious impact on a plant or animal population. Montana State University ecologist William Fraser, however, says that he has evidence that climate change is causing the extinction of Adélie penguins living on the western coast of the Antarctic Peninsula. Over the past 30 years, Fraser has documented a startling 70 percent decline in the number of Adélie penguins nesting on a number of islands in the vicinity of Palmer Station, one of three U.S. research bases in Antarctica.
D They first appear as phrases written in the sky. A line of cursive coalesces in the air, then fragments. Hundreds of shifting lines with words moving between them; language forming, breaking up, reconfiguring. That is how it appears to me. To my friend, Patricia Wynne, an artist, the blue sky seems filled with black lace that is coming unraveled, being rewoven. We pull our car to one side of the road and stand next to a cornfield to watch a lattice weave itself above us and to hear the air fill with the twanging, plucked-rubber-bandlike calls of thousands of migrating sandhill cranes.
E Superman could fly faster than a speeding bullet, presumably a lot faster. But even more powerful than the caped Kryptonian was Albert Einstein, who limited Superman’s flight speed to that of light. So it makes sense that Einstein, too, is now available as an action figure—think G.I. Joe with a rumpled sweater, using his kung fu grip to smash paradigms with a single equation. Or, as the catalogue sales copy has it, “Dressed for intense classroom action, this 5″ tall, hard-plastic Einstein Action Figure stands with a piece of chalk in his hand, poised to explain relativity. . . . Features realistic disheveled hair.”
F Radlett, near London; April 1951; with a deafening roar, a great shining silver aeroplane hurtles down the runway outside the De Havilland Company's huge hangers on this airfield just north of London; a minute later, the world's first jetliner, the Comet, is airborne for the first time as the property of a commercial airline, B.O.A.C, the precursor of today's British Airways. At that moment, few of those on the ground watching the historic take-off could have had any idea of the impact that this new invention was going to have on civilization in the second half of the twentieth century.
G Most of us start out with the best of intentions. Then we walk right past the fruit bowl in search of the devil’s food cake. Or drink one glass of wine too many. Or, after yet another glass, kiss that coworker at the holiday party.
Unfortunately, life constantly presents us with situations that pit our well-reasoned resolutions against the promise of immediate pleasure. As screen legend Mae West once purred, “I generally avoid temptation unless I can’t resist it.” Withstanding temptation takes self-discipline— no easy trick when immediate gratification plumps our sense of well-being. But it is well worth the effort.-
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задача за 5кл два автомобиля выехали одновременно навстречу друг другу из двух городов, расстояние между которыми равно 960 км. через 6,5 ч после начала движения они ещё не встретились и расстояние между ними 115 км. найдите скорость каждого автомобиля ,если скорость одного из них на 10 км/ч больше скорости второго.
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