[单选题]Normally, one RB contains ( )-我要搜题网

[不定项选择题]共用题干第三篇

Citizen Scientists

Understanding how nature responds to climate change will require monitoring key life cycle events一
flowering,the appearance of leaves and the first frog calls of the spring一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一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 publications cover a
hyper-local beat,citizen scientists are ready for the conditions where they live in.All that's needed to become
one is a few minutes each day or each week to gather data and send them 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 eveiy year.The program,called Project BudBurst,collects life cycle data on a variety of
common plants from across the United States.People participating in the project一which is open to every-
one一record their observations on the Project BudBurst website.
"People don't have to be plant experts一they just have to look around and see what's in their neighbor-
hood,"says Jennifer Schwartz,an education consultant with the project."As we collect these data,we'll be
able to make an estimate of how plants and communities of plants and animals will respond as the climate
changes." 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.

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[多选题][T]A-C-G-002375
广播系统数字音频终端的作用()
A.语音信号的编码
B.语音信号的解码
C.放大音频信号
D.告警

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[多选题]以下关于砂的筛分析试验步骤中叙述正确的是( )。
A.用于筛分析的试样,试验前先将来样通过公称直径10.0mm的方孔筛,并计算筛余。
B.称取准备好的烘干试样500g,置于按筛孔大小顺序排列的套筛的最上一只筛上。将套筛装入摇筛机中固紧,筛分15min。10min
C.筛分取出后,按筛孔由大到小的顺序,在清洁的浅盘上逐一手筛,直到每分钟的筛出量不超过试样总量的0.1%时为止
D.试样在各只筛子上的筛余量均不得超过计算得出的剩留量,否则应将该筛的筛余试样分成两份或数份,再次进行筛分,并以其筛余量之和作为该筛的筛余量。
E. 称取各筛筛余试样的质量,所有各筛的分计筛余量和底盘中的剩余量之和与筛分前的试样总量相比,相差不得超过1%;

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[判断题]API 能输出的仅限于一些支付结算的银行服务（）
A.正确
B.错误

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[填空题][当]
恶而颦者，皆可以当侯王。______

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[单选题]Normally, one RB contains ( ) subcarriers.
A.3
B.6
C.12
D.24

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[单选题]Normally, one RB contains ( ) subcarriers.A.3 B.6 C.12 D.24

热门试题:

[单选题]Normally, one RB contains ( ) subcarriers.
A.3
B.6
C.12
D.24