“君子之学必日新，日新者日进也。不日新者必日退，未有不进不退者。”这句话主要告诉我们（  ）

    Near the North Pole there are only two seasons: winter and summer. The winter Nights are long. For more than two months you can't see sun, ever at noon. The summer days are long.For more than two months the never sets and there is no night at all. The weather is cold all the year round. Even summer the temperatures below 0°C. So people there make their clothing with the fur of animals.

    In the cold climate, plants cannot grow. So people have to build their houses with fur, earth, shone or snow. When they go out hunting, they live in the tents of the fur. When they move, they take their tents with them. Sometimes, they build houses of snow. Now don't think that these houses must be cold, it is very warm and safe.

    The life near the North Polo is very interesting.

下列有关我国古代文化成就的搭配，不正确的是（    ）