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Simplified MRI
Tiching explorer Organización
2287 visitas
Magnetic Resonance Imaging (MRI) can tell if we have a tumor. Our head is full of tiny radio transmitters (the nuclear spins of the hydrogen nuclei of our water molecules). In an MRI unit, these little…
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The importance of plants
EduBook Organización
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Photosynthesis is an essential process for plants because it provides them with food. It is not only plants that benefit from photosynthesis. All living things benefit for two reasons: Animals depend on…
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Reptiles
EduBook Organización
2174 visitas
3.1. Reptiles: adapting to the land Reptiles were the first vertebrates to adapt to land and become independent of water. Some examples are lizards, snakes and tortoises. Their main adaptations to life…
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Runes and Runic Alphabets (PET)
EduBook Organización
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Read the information about Runes. Choose a word for each space. The word Rune comes from an early Anglo-Saxon word that means ‘secret’ or ‘mystery’. The Runic alphabet was a of writing using…
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Reading
EduBook Organización
2163 visitas
One year passed. Then a terrible murder happened in London. The murder shocked people because it was very violent and because the victim was an important man. Soon everybody was talking about it. A…
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Napoleon's programme
EduBook Organización
2152 visitas
I think my government should unite all the French (...). The end of the Revolution must be the result of the efforts of all, but to contain the various parties and make them harmless to one another what…
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Look at the map and find the geographical features that these sentences...
EduBook Organización
2142 visitas
Look at the map and find the geographical features that these sentences describe: A river that begins in the Cordilleras Béticas and flows into the Atlantic Ocean. → A mountain range that extends…
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Activities - Halloween
EduBook Organización
2136 visitas
Halloween is an important and exciting festivity in the United States, and almost everyone celebrates it. Halloween is becoming popular in other countries because it’s a lot of fun. The Origins The…
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Demonstrative pronouns
EduBook Organización
1 lo usan

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In Chapter Two, we saw this sentence: This was the sign from God. The demonstrative pronouns are: this, that, these and those. This and these refer to things close to you. That and those refer to things…
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Potencias de exponente natural
EduBook Organización
2109 visitas
Si a es un número real y n es un número natural, la potencia an de base a y exponente n se define de la siguiente forma: Casos particulares Una potencia de base a y exponente 1 es igual a la base: a1…
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