________ they are observing can be tested in a practical way, scientists will use experiments.A、IfB、All thatC、WhatD、If what
________ they are observing can be tested in a practical way, scientists will use experiments.
A、If
B、All that
C、What
D、If what
相关考题：
Some children spend most of their free time ( ) televisionA.lookingB.seeingC.watchingD.observing
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Oneofthekeydecisionmakingfactorsinaverycompetitiveopportunitywillbecost. CompanycomneedsanaggregaterPerfratingof120.Whatisthebestsolution?() A.Twop557016way1.9MHzmachinesB.Onep559032way1.65MHzmachinesC.Onep559532way1.65MHzmachinesD.Twop557016way1.65MHzmachines
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The author used to think of her mother’s English as（ ）A． impoliteB． amusingC． imperfectD． practical
The author used to think of her mother’s English as ______.A. impoliteB. amusingC. imperfectD. practical
The story was published with the sole purpose of selling newspapers.A: realB: mainC: onlyD: practical
During the past ten years there have been dramatic changes in the international situation.A: permanentB: powerfulC: strikingD: practical
共用题干Citizen ScientistsUnderstanding 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______(51)so they are 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 are asking for 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 conditions where they live.______(58)that'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 NationalPhenology（生物气候学）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______(61)to collect data about plant flowering and leafing every year.The program,called Project BudBurst,collects life 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 BudBurst website."People don't______(64)to be plant experts-they just have to look around and see what's in their neighborhood,"says Jennifer Scheartz,an education consultant with the project."As we collect this data,we'11 be able to make an'estimate of______(65)plants and communities of plants and animals will respond as the climate changes."_________53A:giving B:showing C:developing D:observing