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Напишите пожалуйста структурную формулу сульфит калия (K2SO3) . Известный сайт не помог .
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S находится в середине
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Автор:
alisonnewman - 4 года назад
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0
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Спасибо
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Автор:
morenoern9 - 4 года назад
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0
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океу
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Автор:
parker8a7e - 4 года назад
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0
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Запишите множество целых чисел расположенных между данными числами : 1) -9 и -2; 2) -6 и 0; 3) -5 и 3; 4) -3 и 3; СРОЧНО Даю 100 баллов
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6. Underline the correct item.
Our house can't/may be haunted; we've lived here for years and we've never seen or heard anything unusual going on.
The style of that painting must/may be Cubism, because the artist has used square and rectangular shapes.
It can't/may be a coincidence, but isn't it strange that I was thinking about John at the exact moment he called me?
Susan may/must be at the photographic exhibition, but I'm not sure.
The magician's assistant hasn't truly disappeared; our eyes may/must be playing tricks on us!
You may not/can't have seen a ghost. They're not real!
7. Read the text and match the phrases (A-F) to the gaps (41-45). There is one extra phrase.
Nature’s joke? - the strange and wonderful PLATYPUS
The platypus is a strange little creature found only in Australia. When the first platypus was sent to Europe in the 19th century, the scientists who examined it just could not believe their eyes. They believed the platypus was a joke, 41) ....... .They thought some fun-loving Australian had put the feet and nose of a duck onto the body of a rat, 42)……..
But platypuses are real, 43) ............... . Platypuses have a nose like a duck, webbed feet like a duck, soft brown fur on their body and a long, flat tail like a beaver. As if that weren't strange enough, even though they are mammals (which means they feed their babies milk), platypuses don't give birth to live babies 44) ...............! No wonder scientists couldn't decide for a very long time if platypuses were birds, reptiles or mammals.
But the platypus has even more wonderful characteristics. Platypuses find their food in rivers by using electric fields. And, if they are in danger, male platypuses have sharp hooks on their feet 45) ............... .It's no surprise then, that this special, shy little animal is one of Australia's most famous creatures. A picture of the platypus appears on the Australian 20 cent coin. Australians are very proud of their unique platypus.
A just to play a trick on them
B that produce poison strong enough to kill a dog
C which makes them part-reptile, part-mammal, part-bird
D but instead lay eggs just like birds
E and there is no other creature like them on Earth
F because of its extremely strange appearance-
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buckomeyer - 4 года назад
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