[单项选择]

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’t be everywhere so they’re turning to non-scientists, sometimes called citizen scientists, for help.
Climate scientists are not present everywhere. Because there are so many places in the world and not enough scientists to observe all of them, they’re asking for your help in observing signs of climate change across the world. The citizen scientist movement encourages ordinary people to observe a very specific research interest—birds, trees, flowers budding, etc.—and send their observations to a giant database to be observed by professional scientists. This helps a small number of scientists track a large amount of data that they would never be able to gather on their own. Much like citizen journalists helping large publicat
A. to provide their personal life cycles
B. to observe the life cycle of plants
C. to collect data of the life cycle of living things
D. to teach children knowledge about climate change

[单项选择]

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’t be everywhere so they’re turning to non-scientists, sometimes called citizen scientists, for help.
Climate scientists are not present everywhere. Because there are so many places in the world and not enough scientists to observe all of them, they’re asking for your help in observing signs of climate change across the world. The citizen scientist movement encourages ordinary people to observe a very specific research interest—birds, trees, flowers budding, etc.—and send their observations to a giant database to be observed by professional scientists. This helps a small number of scientists track a large amount of data that they would never be able to gather on their own. Much like citizen journalists helping large publicat
A. A citizen journalist.
B. A citizen scientist.
C. A scientist.
D. A citizen.

[单项选择]

Understanding how nature reacts to climate (气候) change will require checking key life cycle events--flowering, the appearance of leaves, the first frog calls of the spring--all around the world. But ecologists (生态学家) can’t be everywhere, so they’re turning to non-scientists, sometimes called citizen scientists, for help.
A group of scientists and educators set up an organization last year called the National Phenology Network. "Phenology" is what scientists call the study of the timing of events in nature.
One of the group’s first efforts is to ask scientists and non-scientists to collect information about plant flowering and leafing every year. The program, called Project BudBurst, collects life cycle information on a variety of common plants from across the United States. People taking part in the project record their information on the Project BudBurst website.
"People don’t have to be scientists--they just have to
A. study animal behavior all year round
B. invite citizen scientists to do scientific research
C. collect information on the life cycles of common plants
D. help ecologists learn about wildfires in western United States

[单项选择]
Understanding how nature responds to climate change will require monitoring key life cycle event-flowering, the appearance of leaves, the first frog calls of the spring all around the world.
But ecologists can’t be everywhere so they’re turning to non-scientists, sometimes called citizen scientists, for help.
Climate scientists are not present everywhere. Because there are so many places in the world and not enough scientists to observe all of them, they’re asking for your help in observing signs of climate change across the world. The citizen scientist movement encourages ordinary people too observe a very specific research interest--birds, trees, flowers budding, etc. and send their observations to a giant database to be observed by professional scientists. This helps a small number of scientists track a large amount of data that they would never be able to gather on their own. Much like citizen journalists
A. a citizen journalist
B. a citizen scientist
C. a scientist
D. a citizen

[填空题]

Paying for Nature

A. How much are the birds of heaven worth How about the lilies of the field Or clean air and water, verdant forests and untouched grassland, healthy coral reefs and lush mangroves By the environmentalist’s accounting, they’re invaluable because nature has a worth all its own. But to business, untouched nature typically hasn’t had a value—at least not one that could be put in a ledger(账簿).
B. Until now, many green—and a growing chorus of corporate suits—are arguing that nature in its own right provides economically valuable services that benefit business. A virgin forest is pleasant to look at, of course, but it also prevents soil erosion and improves water quality at no cost—valuable if you happen to own a beverage (饮料) plant downstream that depends on clean water. That same forest might provide a habitat for bees, which can pollinate(授粉) plants in the surrounding cropland—a vital f