《2025年全品学练考高中英语必修第一册外研版》

B [2025·福建三明第一中学高一期中]
Bumblebee（大黄蜂）populations have declined（下降）by 90 percent in the past 20 years. The decline of the bumblebees is highly concerning as they are significant for ecosystems. They pollinate（授粉）flowers and crops. If their populations were to continue to decline, crops would not be able to produce fruits and vegetables. Despite being small, they are important to nature’s balance. And now, a new study published in the Frontiers in Bee Science has found that the rising heat caused by global warming might be a reason for the decrease in numbers across the globe. “The decline in populations and ranges of several species of bumblebees may be explained by issues of overheating of the nests,” Peter Kevan of the University of Guelph in Canada and lead author of the study said in a statement.
Kevan and his colleagues decided to take a closer look at the facts relating to bumblebee populations across the world. Kevan and the colleagues looked at 180 years of literature on the species and found one common reason across all bumblebee species that they can survive in temperatures up to 36 degrees Celsius, but the perfect temperature for nests is between 28 to 32 degrees Celsius. They are unlikely to be able to adjust themselves to the extent that rising temperatures due to climate change require, the study reports. While individual bees may be able to deal with increased heat better than others, the study notes that if nests are too hot, the groups will not survive.
“The effect of high nest temperatures has not been studied very much, which is surprising,” Kevan said. Similar studies have been done on honeybees（蜜蜂）, another threatened yet highly important species. This suggests further that heat stress is a major factor in bees’ overall decline.
Although the studies led by Kevan have limitations, the potential effects for bumblebee health and conversation are large and long-term.
（ B）5. What do we know about bumblebees from Paragraph 1?
A. They have been extinct within decades in America.
B. Their populations have decreased a lot in the last two decades.
C. Americans are concerned about their living environment.
D. They tend to depend on flowers and crops to survive.
（ D）6. How did Kevan and his co-workers carry out the study?
A. They raised bumblebees to observe them.
B. They focused on studying individual bumblebees.
C. They conducted experiments on bumblebees.
D. They studied literature on bumblebees.
（ B）7. What is the author’s attitude towards Kevan’s studies?
A. Unclear.
B. Supportive.
C. Doubtful.
D. Uninterested.
（ D）8. Which can be a suitable title for the text?
A. Big results for small bumblebees
B. Bumblebee protection inspires scientists
C. The impact of climate change on honeybees
D. Research shows the main reason of bumblebee decline

答案： 5. B 6. D 7. B 8. D