题型：任务型阅读 题类：常考题 难易度：普通
江苏省启东中学2019-2020学年高二上学期英语期初考试试卷
You may have heard that some plants and animals are endangered. What does that mean exactly?
Endangered means there are very few of that kind still alive. Someday they might become extinct. You may wonder what people can do to help them.
Plant trees
As the date of Earth Day roughly coincides with U.S.Arbor Day, planting trees is a popular Earth Day activity. Trees helps to reduce greenhouse gas emissions, clean pollution, secure soil in place to prevent erosion, and provide homes for many birds, insects and other animals.
. And plant them in your garden or on nature strips where plants are usually grown. Restoring the local plant life will help attract native bird life, pollinators and local mammals.
Why not welcome these nonhuman neighbors into your yard？ Here is how to do it. Instead of mowing the entire yard, leave a few sections unmoved. Provide a source of water, like a bird bath or a small pond. Don't try to get rid of snakes, lizards, frogs, moles, squirrels, and the other creatures, many of which are beneficial.
Clean up litter in your community
Many groups use the weekend of Earth Day to clear roadways, highways and neighborhood streets of litter that has accumulated since the last cleanup day.
A. Welcome animals into your yard
B. Choose flowers that are native to your area.
C. One way is to protect the animals' or plants' habitats
D. Bees, butterflies, and many other insects will find this inviting
E. It's a wonderful community project that you can do as an individual or with a group
F. So planting trees is a long lasting act you can do to celebrate Earth Day
G. Encourage people to respect wild spaces by not damaging animal habitats, littering, and dumpling in the water.
Every animal sleeps,but the reason for this has remained foggy. When lab rats are not allowed to sleep, they die within a month.{#blank#}1{#/blank#}
One idea is that sleep helps us strengthen new memories. {#blank#}2{#/blank#} We know that, while awake,fresh memories are recorded by reinforcing (加强)connections between brain cells, but the memory processes that take place while we sleep have been unclear.
Support is growing for a theory that sleep evolved so that connections between neurons(神经元)in the brain can be weakened overnight, making room for fresh memories to form the next day. {#blank#}3{#/blank#}
Now we have the most direct evidence yet that he is right. {#blank#}4{#/blank#} The synapses in the mice taken at the end of a period of sleep were 18 per cent smaller than those taken before sleep,showing that the connections between neurons weaken while sleeping.
If Tononi's theory is right, it would explain why, when we miss a night's, we find it harder the next day to concentrate and learn new information —our brains may have smaller room for new experiences.
Their research also suggests how we may build lasting memories over time even though the synapscs become thinner. The team discovered that some synapses seem to be protected and stayed the same size. {#blank#}5{#/blank#} “You keep what matters,” Tononi says.
A. We should also try to sleep well the night before. B. Ti's as if the brain is preserving its most important memories. C. Similarly, when people go for a few days without sleeping, they get sick. D. The processes take place to stop our brains becoming loaded with memories. E. That's why students do better in tests if they get a chance to sleep after learning. F. “Sleep is the price we pay for learning,” says Giulio Tononi, who developed the idea. G. Tononi's team measured the size of these connections, or synapses, in the brains of 12 mice. |
试题篮
