题型:阅读理解 题类:模拟题 难易度:普通
内蒙古赤峰市2020届高三下学期英语(5月20号)模拟考试卷
Humans really do have a sixth sense that lets us detect magnetic fields (磁场), but we're not aware we have it. It has long been known as ESP, Spider Sense, or the ability to see things before they happen. But now scientists have proved that humans really do have a sixth sense—that lets them detect magnetic fields. Tests have shown that mankind may have the same inborn sense of Earth's magnetic field that has long been proved to exist in animals.
By putting a protein from the human retina ( 视网膜) into fruit flies, researchers noticed that the insect adjusted its flight path just as if its eye had not been changed. This suggests that the "sixth sense" does exist in humans but we might not be aware of it. Animals use such sight to navigate long distances during migration or, in the case of birds, to "see" where they are going. The complex tests involved examining the process by which light goes through a bird's eye, which has interested the scientific community for more than 30 years. In the late 1970s, the physicist Klaus Schulten concluded that birds fly by relying on geomagnetically (地磁) sensitive biochemical reactions in their eyes.
Tests have shown that the special cells in the eye carry out this function using the protein cryptochrome (蛋白隐色素). Professor Reppert's team used wild fruit flies, replacing their version of cryptochrome with the human equivalent (等价物), and then put them in a maze (迷宫) with each wing wrapped in a metal coil (金属圈). They then sent electricity through it so that the coil was magnetised in a way which is just like Earth's electromagnetic field (电磁场). The flies responded in exactly the same way as if they had their own cryptochrome, by either avoiding the magnetic fields or moving towards them if the researchers had placed sugar nearby.
The new study was published in the journal Nature Communications.
We have many trips for you to explore the world your way. Our travel ideas are as diverse as the world itself and are designed to let you experience it. Please start with the following four trips.
Athens and Crete Explorer
Visit Greek's famous capital, Athens, and its largest island, Crete, on this Greece vacation. In Athens, tour the iconic Acropolis and head to nearby Delphi to see the home of the ancient Oracle, before flying to the island of Crete where you can explore its capital, Heraklion, and enjoy its world-famous diet of seafood and cheese. Duration: 8 Days Prices From: US$ 892 Trip Type: Romance & Honeymoon, Tailor-made Travel Ideas |
London for Families
Designed to thrill people of all ages, this family London vacation explores the sights, history and magic of this great city. Visit the world of Harry Potter, the original Madame Tussaud's Wax Museum, and take the Original London Sightseeing Tour. Duration: 9 Days Prices From: US$ 634 Trip Type: Family Vacations, Stopovers/City Breaks, Tailor-made Travel Ideas |
Australia & New Zealand
Explore the two most popular cities of Australia and New Zealand on this air-land tour. Start in Sydney, where you'll tour the Sydney Opera House, sail across the famous harbour, and see koalas and kangaroos at Taronga Zoo. Then head on to Auckland where you'll explore the twin harbours, learn about Maori traditions, and enjoy unbeatable views of the landscape. Duration: 11 Days Prices From: US$ 1,999 Trip Type: Vacation Packages with Airfare |
Classic Egypt
This tour is a true classic designed to give the traveler with limited time a superb introduction to the civilization of Ancient Egypt, focusing on the Nile and its importance to the people. The ancient land of Egypt inspires the imagination like no other. Unlock the land of the Pharaohs on this 9 day journey along the Nile. Duration: 9 Days Prices From: US$ 1,495 Trip Type: Classics (Bestsellers), Tailor-made Travel Ideas |
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