题型:阅读选择 题类:常考题 难易度:普通
牛津版(深圳•广州)2019-2020学年初中英语八年级上册Module 1 Unit 1 Encyclopaedias第6课时 Integration
Once people thought that dinosaurs were brown or gray in colour, but the answer is to be found out. After examining the remains of a dinosaur, scientists say the colour of the feathers is bright. American and Chinese scientists rebuilt the feathers of a flightless(不能飞的)dinosaur
that lived about 150 million years ago, and researchers studied melanosomes(黑素体)in the feathers. The researchers compared them to the melanosomes that control the colour of feathers on modern birds. They were then able to make out the colours of dinosaurs' feathers. Richard Prum, a biologist(生物学家)at Yale University, said the dinosaur would be a beautiful creature if it were still alive. The discovery is useful to scientists in another way. It helps them better understand not only how dinosaurs looked but also how they lived in their daily life. Some researchers plan to use this way to study the colours of other feathered dinosaurs.
A
▲How nosebleeds happen: |
Nosebleeds are very common among children and often result from activities such as blowing the nose too hard or getting hit on the nose during play.Catching colds or the flu can also cause (引起) nosebleeds.Usually,bleeding isn't very serious and it will stop in less than ten minutes. |
▲When nosebleeds happen: |
Your child may be frightened that there is something seriously wrong.Crying may make the bleeding worse, so it is important for you to tell him that he will be fine. |
▲How to give first aid: |
Let your child sit upright(直立) and tell him to put his head down. |
Help your child press the sides of the nose for ten minutes.Do not stop to see if the bleeding has stopped. |
▲If first aid works: |
Rest your child for the next 12—24 hours.Tell him to do quiet activities such as drawing,reading a book or watching TV. |
Tell him not to take a hot shower for at least 24 hours after a nosebleed. |
Tell him not to touch or blow his nose for 24 hours. |
▲If first aid doesn't work: |
You'd better take him to hospital. |
试题篮