答案联动网亳州市普通高中2021-2022学年第一学期高三年级期末质量检测英语试题，下面是亳州市普通高中2021-2022学年第一学期高三年级期末质量检测英语试题部分示例，验证如下:
30. Why did the holiday Juneteenth cause confusion this year？
A. People had no idea of its origin
B. It fell on different days in the world
C. It was easily confused with another holiday
D People nearly had no time to prepare for it
31. What can be the best title for the text？
A. The USA Now Has a New National Holiday
B Black People Gain Equal Rights Again
C. The Origin of American Independence Day
D. The History of American National Holiday
D When temperatures rise, male dragonflies have come up with a clever way to stay cool. They lose some of the showy coloration（色彩） on their wings, u new study finds For the study, researchers created a database of 319 dragonfly species using observations from citizen scientists on the platform nAturalist First, they looked to see whether dragonflies have adapted to warmer climates with evolutionary changes in wing coloration. They found that species in warmer areas have males that evolved with less coloration on their wings.
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亳州市普通高中2021-2022学年第一学期高三年级期末质量检测英语试题