广东省湛江市徐闻中学2023-2024学年高二英语上学期周测1

2025届高二英语科周测试题 1、 阅读理解（每一小题2.5分共37.5分） A California has lost half its big trees since the 1930s, according to a study to be published Tuesday and climate change seems to be a major factor. The number of trees larger than two feet across has dropped by 50 percent on more than 46, 000 square miles of California forests, the new study finds. No area was spared or unaffected, from the foggy northern coast to the Sierra Nevada Mountains to the San Gabriels above Los Angeles. In the Sierra high country, the number of big trees has fallen by more than 55 percent; in parts of southern California the decline was nearly 75 percent. Many factors contributed to the decline, said Patrick McIntyre, an ecologist who was the lead author of the study. Woodcutters targeted big trees. Housing development pushed into the woods. The wildfire control measures have left California forests crowded with small trees that compete with big trees for resources(资源). But in comparing a study of California forests done in the 1920s and 1930s with another one between 2001 and 2010, McIntyre and his colleagues documented a widespread death of big trees that was evident even in wildlands protected from woodcutting or development. The loss of big trees was greatest in areas where trees had suffered the greatest water shortage. The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed, taking into account such things as rainfall, air temperature, dampness of soil, and the timing of snowmelt. Since the 1930s, McIntyre said, the biggest factors driving up water stress in the state have been rising temperatures, which cause trees to lose more water to the air, and earlier snowmelt, which reduces the water supply available to trees during the dry season. 21．What can we infer from the second paragraph? A．The big-tree loss is serous in California. B．The variety of California big trees is declining. C．Only few are