题型:语法填空(语篇) 题类: 难易度:困难
广东省梅州市部分学校2023-2024学年高二下学期4月期中英语试题
An international team of astronomers used a database combining observations from the best telescopes in the world (detect) the signal from the active supermassive black holes of dying galaxies(星系) in the early universe. The (appear) of these active supermassive black holes is related to changes in the host galaxy. This means a black hole could have far reaching effects the evolution of its host galaxy.
The Milky Way Galaxy we live includes stars of various ages, including stars still forming. But in some other galaxies, (know) as elliptical(椭圆的) galaxies, all of the stars are old and about the same age. This indicates that early in (they) histories elliptical galaxies had a period of rich star formation that suddenly ended. Why this star formation stopped in some galaxies not others is not well understood. One possibility is that a supermassive black hole disrupts(瓦解) the gas in some galaxies, (create) an environment unsuitable for star formation.
To test this theory, astronomers look at distant galaxies. Due to the limited speed of light, it takes time for light to travel across the void of space. The light we saw last night from an object 10 billion light years away (travel) for 10 billion years to reach Earth. Thus the light we see today shows us what the galaxy looked like when the light left that galaxy 10 billion years ago. So looking at distant galaxies is like looking back in time. But the longer distance also means that distant galaxies look (small), making study more difficult.
Bees (蜜蜂) touch our lives in ways we may not realize. They are responsible for as much as one third of the food that we eat, and even play a role in growing the cotton (棉花) used in much of our clothing. {#blank#}1{#/blank#} Here's how you can help:
1. Plant more flowers
Bees depend on garden flowers to ensure they have different kinds of diet. By planting flowers in your garden you can create a pleasant place for bees. {#blank#}2{#/blank#} Another idea is to add hanging baskets of flowers next to your front door.
2. Find a space for a beehive (蜂窝) in your garden
Many would-be beekeepers find it difficult to find a safe space for their bees. If you have some space, contact your local beekeeping organization. {#blank#}3{#/blank#} You will be surprised what a difference a beehive will make to your garden.
3. Give bees water
{#blank#}4{#/blank#} They use water to produce food for their bee families and control the temperature in their hives. Bees look for a clean source of water. Leave out containers filled with clean water in your outdoor spaces and refresh them often.
4. Be bee friendly
Bees are good neighbors, and only sting (蜇) when they feel threatened. Beekeepers wear protective clothing when they are dealing with bees. If a bee flies in front of you when unprotected, do not flap (拍打) your hands. {#blank#}5{#/blank#} The bee will soon lose interest.
A. Stay calm and move slowly away. B. Fight the diseases that affect bees. C. They could find a beekeeper in need of a site. D. One way to help bees is to buy local produce. E. Like every living creature, bees need water to survive. F. But more than one quarter of the species is facing extinction. G. You don't even need a garden space to attract bees; your window box will do. |
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