Of all the animals on Earth, none are more willing to explore than humans. So what causes us to explore across the world?Maybe it's in our DN A. In 1999, Dr.Chuansheng Chen carried out a study of a gene(基因) known as DRD4-7R. This gene is found in about 20% of all humans....
1Ⅱ.任务型阅读There are different kinds of animals onthe earth. Some animals, such as tigers andelephants,live in big forests. We call themwild animals. Some others like cows anddogs live with humans, and we call themdomestic(家用的)animals.Animals are important to humans.Humans catch wild...
are among the oldest animals on the earth. There are over 500 kinds of sharks living in the oceans. 66 Yet some are small, for example, the dogfish shark is less than 20cm long. The shark has a sense of smell. 68. Sharks eat fish and plants in the ocean. Sharks grow slowly. 69....
There are different kinds of animals on the earth. Some animals, such as tigers and elephants, live in the big forests(森林). We call them wild animals. Some others like cows and dogs live with humans(人类), and we call them domestic(家养的) animals. Animals are important to humans. ...
They are more important than wild animals.”可知,驯养动物比野生动物更重要。故填important。 (2)题详解: 根据“Sheep and pigs are useful for humans’ food.”可知,羊和猪主要为人类提供食物。故填food。 (3)题详解: 根据“Humans catch wild animals for their fur (皮毛) and meat. ”可知,...
Monkeys Are Better At Problem-Solving Than Humans Humans are the most intelligent (聪明的) animals on Earth. We have mental abilities that other animals don’t have. But sometimes, our way of thinking can become an ...
There are different kinds of animals on the earth.Some animals, such as tigers and elephants, live in the bigforests. We call them wild animals. Some others like cowsand dogs live with humans, and we cal them domestic(驯养的)animals.Animals are important to humans. Humans catch wildanimals...
There are lots of animals on the earth. What is the biggest animal of all? The whale or the elephant? We all know elephants are the biggest animals on land. But blue whales are bigger than any other animal in the world. A blue whale can be more than thirty meters long and weighs ov...
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Yet he is lord of all the animals. He sets them to work, he gives back to them the bare minimum that will prevent them from starving, and the rest he keeps for himself. Our labour tills the soil, our dung fertilises it, and yet there is not one of us that owns more than his ...