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_____for your help．
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更多“_____for your help．_____for your help．”相关的问题
B．It’s my pleasure
C．Nothing particular
D．No problem
B．Not at all
C．It doesn’t matter
D．No thanks
Making Light of Sleep
All we have a clock located inside our brains. Similar to your bedside alarm clock, your intemal clock runs on a 24-hour cycle.-This cycle, called a circadian rhythm, helps control when you wake,when you eat and when you sleep.
Somewhere around puberty, something happens in the timing of the biological clock. The clock pushes forward, so adolescents and teenagers are unable to fall asleep as early as they used to. When your mother tells you it&39;s time for bed, your body may be pushing you to stay up for several hours more.
And the light coming from your computer screen or TV could be pushing you to stay up even later.
This shift is natural for teenagers. But staying up very late and sleeping late can get your body&39;s clock out of sync with the cycle of light and dark. It can also make it hard to get out of bed in the morning and may bring other problems, too. Teenagers are put in a kind of a gray cloud when they don&39;t get enough sleep, says Mary Carskadon, a sleep researcher at BrownUniversity. It affects their mood and their ability to think and learn.
But just like your alarm clock, your internal clock can be reset. In fact, it automatically resets itself every day. How？ By using the light it gets through your eyes. Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal clocks. For years,researchers thought that the signals that synchronize the body&39;s clock were handled through the same pathways that we use to see.
But recent discoveries show that the human eye has two separate light-sensing systems. One system allows us to see. The second system tells our body whether it&39;s day or night.
The clock located inside our brains is similar to our bedside alarm clock because __________. 查看材料
A.it controls when we wake， when we eat and when we sleep
B.it has a cycle of 24 hours
C.it is a cycle also called circadian rhythm
D.it can alarm any time during 24 hours
Citizen Scientists
Understanding how nature responds to climate change will require monitoring key life cycle events- flowering, the appearance of leaves, the first frog calls of the spring--all around the world. But ecologists can&39;t be __________(51) so they&39;re turning to non-scientists, sometimes called citizen scientists, for help.
Climate scientists are not present everywhere. __________ (52) there are so many places in the world and not enough scientists to observe all of them, they&39;re asking your help in __________ (53)signs of climate change across the world. The citizen scientist movement encourages __________ (54)people to observe a very specific research interest--birds, trees, flowers budding, etc.- and send their observations__________ (55) a giant database to be observed by professional scientists. This helps a small number of scientists track a__________ (56) amount of data that they would never be able to gather on their own. __________(57) like citizen journalists helping large publications cover a hyper-local beat, citizen scientists are ready for the condition- where they live. __________ . (58) that&39;s needed to become one is a few minutes each day or each week to gather data and __________(59)it in.
A group of scientists and educators launched an organization last year __________(60) the National Phenology (生物气候学) Network. "Phenology" is what scientists call the study of the timing of events in nature.
One of the group&39;s first efforts relies on scientists and non-scientists__________ (61) to collect data about plant flowering and leafing every year. The program, called Project Bud Burst, collects cycle __________ (62) on a variety of common plants from across the United States. People participating in the project--which is__________ (63) to everyone--record their observations on the Project Bud Burst website.
"People don&39;t__________ (64) to be plant experts- they just have to look around and see what&39;s in their neighborhood," says Jennifer Schwartz, an education consultant with the project.
"As we collect this data, we&39;ll be able to make an estimate of__________(65) plants and communities of plants and animals will respond as the climate changes."
_________ 查看材料
A.everywhere
B.anywhere
C.somewhere
D.nowhere
Why Buy Shade-Grown Coffee？
When people argue about whether coffee is good for health, they&39;re usually thinking of the health of the coffee drinker. Is it good for your heart？ Does it increase blood pressure？ Does it help you concentrate？ However, coffee affects the health of the human population in other ways, too.
Traditionally, coffee bushes were planted under the canopy (树冠) of taller indigenous (土生土长的) trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees. At first, this increases production because more coffee bushes can be planted if there aren&39;t any trees. With increased production come increased profits.
Unfortunately, deforesting for coffee production immediately decreases local wildlife habitat.
Native birds nest and hide from predators (捕食者) in the tall trees and migrating birds rest there.
Furthermore, in the long term, the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed to grow the coffee. The fertilizers and pesticides kill insects that eat coffee plant, but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well, and can even enter the water that people will eventually drink.
Fortunately, farmers in Central and South America are beginning to grow more coffee bushes in the shade. We can support these farmers by buying coffee with such labels as "shade grown" and "bird friendly". Sure, these varieties might cost a little more. But we&39;re paying for the health of the birds, the land, ourselves, and the planet. I think it&39;s worth it.
What is the main idea of this passage？ 查看材料
A.Farmers are changing the way they grow coffee
B.Coffee is becoming more expensive to produce
C.Shade-grow coffee is more expensive than sun-grow coffee
D.People should buy shade-grown coffee
A、A. won't achieve
B、B. didn't achieve
C、C. don't achieve
D、D. wouldn't have achieved
A、Start with your most prveious work.
B、Start with your most successful job.
C、Start with your most exicting job.
D、Start with your most recent job.
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