阅读理解，请根据短文内容，为每题确定1个最佳选项。
Citizen Scientists
Understanding how nature responds to climate change will require monitoring key life cycleevent-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．
CIimate scientists are not present everywhere．Because there are so many places in the worldand not enough scientists to observe all of them，they're asking for your help in observing signs ofclimate change across the world．The citizen scientist movement encourages ordinary people too bserve a very specific research interest-birds，trees，flowers budding，etc．and send their observationsto a giant database to be observed by professional scientists．This helps a small number of scientiststrack a large amount of data that they would never be able to gather on their own．Much like citizenjournalists helping large publications cover a hyper-local beat，citizen scientists are ready for theconditions where thev live． All that's needed to become one is a few minutes each day or each weekto gather data and send it in．
A group of scientists and educators launched 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 relies on scientists and non-scientists alike to collect data about plant flowering and leafing every year．The program，called Projeet BudBurst，collects life cycle da. ta on a variety of common plants from across the United States．People participating in the projectwhich is open to everyone record their observations on the Project BudBurst website．
"People don't have to be plant experts，they just have to look around and see what's in their neighborhood，"says Jennifer Schwartz，an education consultant with the project．"As we collectthis data．we'll be able to make an estimate of how plants and communities of plants and animals will respond as the climate changes．"
36．Ecologists turn to non-scientist citizens for help because they need them__________________．
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
37．What are citizen scientists asked to do?
A．To develop a specific research interest and become professional scientists．
B．To send their research observations to a professional database．
C．To increase their knowledge about climate change．
D．To keep a record of their research observations．
38．In"All that，s needed to become one…(paragraph2)"，what does the word"one"stands for?
A．a citizen journalist
B．a citizen scientist
C．a scientist
D．a citizen
39．What is NOT true of Project BudBurst?
A．Only experts can participate in it．
B．Everybody can participate in it．
C．It collects life cycle data on a variety of common plants．
D．It has its own website．
40．What is the final purpose of Project BudBurst?
A．To study when plants will have their first buds．
B．To find out the types of plants in the neighborhood．
C．To collect life cycle data on a variety of common plants from across the United States．
D．To investigate how plants and animals will respond as the climate changes．
参考答案及解析
36．C[解析]前文提到科学家们没有可能去观察每一个地方的气候变化现象，所以邀请普通人为他们观察、收集信息。
37．B [解析]根据"sentltlaeii'obseivations to a giant dataJbase t0 be obsetveclby professional scientists''可得知。
38．B [解析]根据后文"a few minutes each day 0r each week to gather data and sencIitin"，可见就是对citizen scientist的描述。
39．A[解析]文章全文都在说普通人参与科学研究的项目，因此，只有A选项不符合。其他选项都能在文中找出。
40．D [解析]问题为final purpose，所以选D，跳过C。
