题型:阅读理解 题类:常考题 难易度:普通
河南省平顶山市2020届高三上学期英语10月阶段性检测试卷
The world's oceans will likely lose about one-sixth of their fish and other creatures within 100 years if climate change continues on its current path. Every degree Celsius that the world's oceans warm, their biomass is expected to drop five percent, a study found.
The study predicts that if there is no change in the rate of worldwide greenhouse gas production, there will be a 17-percent loss of biomass by the year 2100. But, if the world reduces carbon pollution, biomass losses could be limited to only about 5 percent.
Warming temperatures are the biggest issue. But climate change also produces oceans that are more acidic and have less oxygen. This also harms sea life. Much of the world depends on the oceans for food or work.
The findings make sense and the possible effects of the predicted losses of animal life are huge. "Climate change has the potential to cause serious new conflicts over ocean resource use as the human population continues to grow," said scientists.
Marine biologist Boris Worm, who helped run the study, added that the "building blocks of marine life—plankton and bacteria—may decline less heavily."
"Those marine animals that we use directly, and care about most deeply, are predicted to suffer the most," said Worm. He works at Canada's Dalehousie University.
Scientists had already believed climate change would likely reduce future ocean life. But past computer-based studies looked at only part of the picture or used only one model. The latest study used six different computer models to give the best picture look yet, William Cheung said.
University of Georgia marine biologist Samantha Joye was not part of the research. But she praised the study as well researched and extremely detailed, and called it "an urgent call for action".
Reducing the amount of sleep affects students' performance at school. An American study asked schoolteachers to look at the effects of sleep restriction(限制) on children between six and twelve years of age. The teachers found that children who stayed up late had trouble thinking clearly and had more learning problems.
{#blank#}1{#/blank#} Doctor Fallone now works at the Forest Institute of Professional Psychology in Springfield, Missouri. He presented the results last month at a science reporter conference in Washington, D. C. The Publication Sleep also reported the findings.
The teachers were asked to complete weekly performance reports on seventy-four schoolchildren. The study lasted three weeks. During that period, Doctor Fallone and his team controlled the amount of sleep the children received.
{#blank#}2{#/blank#} During another week, every child was kept awake later than normal. Each night, the youngest boys and girls had less than eight hours of sleep. The older ones were limited to six and a half hours. During the final week of the study, each child received no less than ten hours of sleep a night.
The teachers were not told about how much sleep the students received. The study found that students who received eight hours or less had the most difficulty remembering old information. {#blank#}3{#/blank#}
The study did not find that sleep restriction caused hyperactivity(极度活跃) in the children. {#blank#}4{#/blank#}
Doctor Fall one said that the results provided experts and parents with a clear message: {#blank#}5{#/blank#}
A. The sleeping time that the students have can be changed easily. B. They also had trouble learning new information, completing difficult work and following directions. C. During one week, the children went to bed and awoke at their usual time. D. The teacher should restrict the amount of sleep of the students. E. Gahan Fallone did the study at the Brown Medical School and Bradley Hospital in the state of Rhode Island. F. The teachers reported that students were, in fact, a little less active at school when they got less sleep. G. When a child has learning problems, the issue of sleep must be considered among the possible causes. |
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