题型:阅读理解 题类:常考题 难易度:普通
贵州省毕节市2017-2018学年高一下学期英语期末考试试卷
The insects are important to farmers. When a honeybee lands on a flower in plant, pollen (花粉) sticks to its legs. When the bee lands on another flower, some of the pollen falls off and fertilizes the second plant.
The act of spreading pollen is responsible for many fruits, vegetables, nuts and other crops. Yet about 30 percent of honeybees in the United States and other areas have died in recent years.
Mike Leggett is a researcher at the University of Maryland. He wants to learn why so many bees are dying. “The number of colonies (蜂群) that die every winter has been one in three. So on average 30 percent of the colonies have died every winter over the last six winters. And that's a huge number.” His research team examined the pollen that honeybees carried to their homes. They found that the pollen contained high levels of 35 different pesticides (杀虫剂), which are chemicals used to protect plants. “Pesticides are used, and have been used, pretty widely, for centuries, to protect plants from diseases,” says Mr Leggett.
Keith Oh linger, a farmer and beekeeper in Maryland, has watched many of his bees die every winter. Mr Ohlinger thinks widespread bee death is caused by several things happening at once. But he does not feel sure that pesticides are a part of the problem, “I felt it was the result of a lot of little things. I didn't feel that there was probably one smoking gun. But there's a division (分歧) there, some people feel that it is just one thing.”
Honeybees are important to agriculture. This makes the search for an answer to their death very important for Mr Leggett's team. As he knows, one in every three bites of food we eat is somehow pollinated by honeybees.
SCOTTISH DANCING IT'S FUN IT'S GOOD EXERCISE *We have classes for dancers of all abilities. *Previous experience is not essential. *All you need to bring is a pair of soft shoes and enthusiasm. *Classes are held in a number of places and at different times. *We guarantee you a warm welcome. |
THE RENAISSANCE SINGER New singers are invited to join our choir, formed in 1993,to perform a wide variety of music in Cambridge. We meet every Wednesday evening from 7. 30—9. 30pm, and this term we are rehearsing for a special concert with audience participation on Saturday 1st December. An ability to sight-read and previous experience in choral singing is desirable, although not essential. |
DRAWING WITH COLOUR An intensive workshop for beginners. Saturday 13th and Sunday 14th October This unusual workshop offers instruction in effective ways to draw in colour. Activities will include study of light and shade and ways to express mood and emotion in colour. The small class(12 students) assures maximum attention for each student. Professional quality materials are included in the fee of£95. |
WORLD CULTURE DAY Brazilian Street Percussion(打击乐) 2.30—4.30 Samba percussion workshop. Lift your spirits with the taste of carnival! It doesn't matter whether you're experienced musician or a complete beginner, you'll be creating complex amazing rhythms in no time. African Storytelling 3.45—4.45 The magical African story-telling tradition of narration, poetry and proverbs(mainly from Ghana and Nigeria). An event for all the family. |
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