《2025年资源库高中英语人教版》

[全国新课标Ⅰ 2024·D篇 32] In the race to document the species on Earth before they go extinct, researchers and citizen scientists have collected billions of records. Today, most records of biodiversity are often in the form of photos, videos, and other digital records. Though they are useful for detecting shifts in the number and variety of species in an area, a new Stanford study has found that this type of record is not perfect.
"With the rise of technology it is easy for people to make observations of different species with the aid of a mobile application," said Barnabas Daru, who is lead author of the study and assistant professor of biology in the Stanford School of Humanities and Sciences. "These observations now outnumber the primary data that comes from physical specimens (标本), and since we are increasingly using observational data to investigate how species are responding to global change, I wanted to know: Are they usable?"
Using a global dataset of 1.9 billion records of plants, insects, birds, and animals, Daru and his team tested how well these data represent actual global biodiversity patterns.
"We were particularly interested in exploring the aspects of sampling that tend to bias (使有偏差) data, like the greater likelihood of a citizen scientist to take a picture of a flowering plant instead of the grass right next to it," said Daru.
Their study revealed that the large number of observation-only records did not lead to better global coverage. Moreover, these data are biased and favor certain regions, time periods, and species. This makes sense because the people who get observational biodiversity data on mobile devices are often citizen scientists recording their encounters with species in areas nearby. These data are also biased toward certain species with attractive or eye-catching features.
What can people do with the imperfect datasets of biodiversity?
"Quite a lot," Daru explained. "Biodiversity apps can use our study results to inform users of oversampled areas and lead them to places—and even species—that are not well-sampled. To improve the quality of observational data, biodiversity apps can also encourage users to have an expert confirm the identification of their uploaded image."
What do we know about the records of species collected now?
A. They are becoming outdated.
B. They are mostly in electronic form.
C. They are limited in number.
D. They are used for public exhibition.

答案： B
解析：细节理解题——语义转换。根据第一段中的“Today, most records of biodiversity are often in the form of photos, videos, and other digital records.”可知，现在大多数生物多样性记录通常采用照片、视频和其他数字记录的形式。由此可知，现在收集的物种记录主要以电子形式存在。

How much do you pay for renting a bike with hand brake and three gears for two days?
A. €15.75.
B. €19.50.
C. €22.75.
D. €29.50.

答案： C
解析：细节理解题——数字计算。根据Prices部分的表格信息可知，租借一辆带手刹和三个排挡的自行车，一天需要14.75欧元，每多租借一天就要多付8欧元，故租借该类车两天共需租金22.75欧元。