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Whales are mammals, but they live in the sea. They breath air, but they can't survive on land. Some types of whales are very large indeed. Blue whale, for example, can grow to more than 30 meters in length. They are the largest animals that lived on earth.
At a glance whales look rather like fish. However, there are some important differences in their external structures. Whales have tails that are broad, flat and horizontal. These tails function as paddles. They also have single nostrils on top of their large broad heads.
A whale's skin is smooth and shiny. Beneath the skin there is a layer of fat or blubber. The fat is up to 30 cm in thickness. This fat keeps heat and fluids so that it can live in cold water.
Find the synonym of the words below from the text!
a. Ground
b. Big
c. Significant
d. World
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A. Mulyanto
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