How many kinds of animals live on the Earth?A recent survey shows that scientists have found more than 2 million kinds of animals and there are over 10 million we haven't discovered yet.Animals are much more than food or pets for humans.Animals are smart.Some of them do very unusual thi...
Though taxonomists have been cataloguing plants and animals for more than 250 years, they still have no exact answer to the question, “How many species are on Earth?”“It’s a very simple question, but we have no simple answer,” Fisher said. One of the reasons we can’t get an...
1 How are humans different from other animals on Earth? We have always thought of ourselves as being smarter and more advanced (先进的). But with the development of AI, this question becomes more complicated (复杂的). In October 2017, a robot called Sophi a was made a Saudi Arabian citiz...
7. How do migratory animals know where they're going? 7.迁徙动物如何知道它们要去哪里? 8. How many species are there on Earth? 8.地球上有多少物种? 9. How do organisms evolve? 9.有机体是如何进化的? 10. Why did dinosaurs grow to be so big? 10.为什么恐龙长得如此之大? 11. Did anci...
Earthquakes may take place anywhere on the earths surface. During all earth quake, the vibrations make the earths surface tremble, and even crack open. Houses fall, people are lilled or injured and sometimes whole cities are destroyed.
19. People have used solar energy for many years. They build houses with windows so that the sunlight ___ get inside and make them warm. 此处表示“能够”,应该用can。 20. There ___ solar panels that collect energy from sunlight to make electricity. There be句型中,be动词的单复数形式取决...
Protect Our Environment It is important to beal with the rubbish in cities. Our world was colorful,beautiful and full of life. But these years, people have built many factories along rivers. Many trees have been cut down. Many animals have lost their homes. Factories cause pollution. Rivers ...
Pet pigs must be kept on a diet (节食). They like to eat like hogs (肉猪)! 4 An adult pet pig should not weigh more than 150 pounds. But many weigh up to 300 pounds because of overfeeding. Pigs are some of the cleanest animals on the earth. They can learn to use a little ...
Study Solves Mystery of How First Animals Appeared on EarthResearch led by the Australian National University has solved the mystery of how the first animals appeared on Earth, a pivotal moment for the planet without which humans would not exist.Australian National University...
Like other species, we are the products of millions of years of adaptation. Now we're taking matters into our own hands.