Fish of many colours and sizes can be found in the sea. They breathe (呼吸) in the water with the help of their gills and they get oxygen from the water, i nstead (93) of from the air. Fish can be found almost everywhere as long as there is water. Some live in fresh water ...
People and animals may get ill when they breathe the dirty air or drink the dirty water. Grass, trees and flowers will be dead if they grow from the dirty soil. That is a big problem. What can we do with rubbish? We must throw and reuse rubbish in right ways. We shouldn't throw ...
This book far I have not imagined am so difficult.[translate] a準 拠 整合[translate] aThese are harming the earth's animals and plants.They also harm the air we breathe and water we drink 这些危害地球的动物和植物。他们也危害我们呼吸的空气并且浇灌我们喝[translate]...
Dolphins are air-breathing animals that live in the sea. But how do they sleep? Giraffes have almost no deep sleep. Do they feel tired? Scientists studying seals (海豹) and dolphins have made a surprising discovery一these animals can sleep with one half of their brain while the other half...
While the right half of the dolphin's brain is asleep, the left half stays awake enough to control its body. This lets the dolphin keep its nose above the water so it can breathe. After about 20 minutes, two sides exchange, allowing the other half of the dolphin's brain to sleep. ...
One of the most incredible things is that giraffes根据材料内容,从下面五个选项中选出能填入文中空 的最have the same number of bones in their necks as we do, And they use项.使文章意思通顺、内容完整。their long necks when fighting each other. A. They can also be medicine.Giraffes don't ...
People and animals may get ill when they breathe the dirty air or drink the dirty water. Grass, trees and flowers will be dead if they grow from the dirty soil. That is a big problem. What can we do with rubbish? We must throw and reuse rubbish in right ways. We shouldn't throw ...
soil, while amphibians live in or near water. Animals that can breathe through their skin have moist skin and have tiny blood vessels or capillaries that lie close their skin surface. These tiny vessels transport oxygen to their various tissues and carry carbon dioxide to the outer skin layer....
Why do elephants have trunks, tusks and big ears? Elephants may look strange, but all of their body parts evolved for a reason. An elephant's trunk is a multipurpose tool that helps the animal breathe, eat, drink, smell and grab things. African elephants have two small "fingers" at the...
Summers are hot in many places. The weather gets very warm and sticky. It can be hard to keep cool. People have many ways to cool off. We can use air conditioning to cool our houses. We can go to the pool or...