Children's Encyclopedia1976 |
Des de l'interior del llibre
Resultats 1 - 3 de 12.
Pàgina 15
... builds up behind the dam . It can then be sent through big pipes and made to spin huge water turbines like the one in ... build than coal or oil power stations . But they are much cheaper to run . They do not need any fuel . As coal and ...
... builds up behind the dam . It can then be sent through big pipes and made to spin huge water turbines like the one in ... build than coal or oil power stations . But they are much cheaper to run . They do not need any fuel . As coal and ...
Pàgina 28
... building . First they cut down trees with their strong front teeth . They eat the bark and use the wood to make a dam across a stream . A pond of calm water collects be- hind the dam . In the middle of the pond the beavers build their ...
... building . First they cut down trees with their strong front teeth . They eat the bark and use the wood to make a dam across a stream . A pond of calm water collects be- hind the dam . In the middle of the pond the beavers build their ...
Pàgina 42
... building . Part of it is cut away to show the offices and elevators inside . On top is a landing place for helicopters . In the ground under it you can see the building's foundations . Behind this block is the main railway station ...
... building . Part of it is cut away to show the offices and elevators inside . On top is a landing place for helicopters . In the ground under it you can see the building's foundations . Behind this block is the main railway station ...
Altres edicions - Mostra-ho tot
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