题型:阅读理解 题类:模拟题 难易度:普通
山东省德州市2019届高三下学期英语第一次练习英语试卷
More than 40 percent of the species that help with pollination (植物传粉) are under threat due to the polluted environment. So some researchers have been searching for ways to protect the bees and other crucial pollinators while some engineers have thought perhaps an army of robotic pollinators could keep humans well-supplied in these foods. A team of researchers has recently designed a small drone capable of pollinating flowers. They tested their device on the large, pink flowers of lilies. And it worked.
Exciting as this success was, it is only the first step. The team has yet to figure out how to apply the concept on the massive scale. Could a fleet of robo-pollinators replace the bees?
“Although the answer isn't a straightforward no, it would be a challenging leap to go from this one little drone pollinating one large flower to an army of drones spreading across fields of crops,” says Scott Swinton, an agricultural economist at Michigan State University.
“The successful pollination was fascinating,” Scott Swinton says, “but the device itself might damage the flowers. I wonder how you make sure you're not doing more harm than good to flowers when you have a drone.”
“Furthermore,” he points out, “a lily is a particularly easy flower for a drone to pollinate. To make this more broadly applicable for smaller and more complex flower structures, the drones would need to be particularly agile.”
Still, Joshua Campbell, an expert at the University of Florida, says “Pollination systems are extremely complex and will always require insects. There is no substitute for bees.”
“As for the technology itself, it is a promising new development in existing drone technology,” he added. Yet he still sees some hurdles ahead before drones can be applied on a large scale.
Mill 180 Park is truly a park for the 2lst century, designed to copy all of the great urban parks -Central Park in New York City, Hyde Park in London and Ueno Park in Tokyo. Through the use of computerized sound and some other modern systems, we've brought the outside in, surrounding our visitors with green space and a remarkable sense of the natural world.
We spent a lot of time trying to learn why these parks are so beloved, what makes them work so well for their sponsors, and how they provide a place of rest for so many.
A wake up call for the senses |
These parks are beautiful. They provide much needed relief from the daily stress of city living in any particular moment. But with the good, every one of these parks suffer from the same shortcoming-they are not fit to live when the weather is bad. What this means is that our parks are only really available to us some of the time. |
Change in the air |
Enjoying Mill 180 Park is not weather dependent. We used modern building techniques and technology to create a park that can be enjoyed in every season, during every type of weather. |
Our focus |
While imagining the possibilities for Mill 180 Park, we focused our design process on five characteristics that were common in all of our favorite urban parks: BEAUTY: Including natural and man-made qualities, delighting the senses of visitors. GREENERY: Bringing nature to the city, with a variety of plants and green spaces. MINGLING: Providing a place for people who wouldn't normally come into contact to meet and share experiences. TRANQUILITY: Offering a place away from the noise, waste, and excitement of city life. PROGRAMMING: Serving as a site for artistic, cultural, and amusement events that bring the community together. When you visit, you'll be aware on an intellectual level that you are not in an expansive outdoor space, but your senses will tell you otherwise. |
Opening time and price |
All months of the year. Admission is free from Jan .I to Nov.30. |
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