更多"[单选题]The world's oceans have warmed"的相关试题:
[单选题]The world's oceans have warmed 50 percent faster over the last 40 years than previously thought due to climate change,Australian and US climate researchers reported Wednesday．Higher ocean temperatures expand the volume of water,contributing to a rise in sea levels that is covering small island nations and threatening to destroy the low-lying,densely-populated low regions around the globe.
The study,published in the British journal Nature,adds to a growing scientific chorus of warnings about the pace and consequences rising oceans．It also serves as a corrective to a massive report issued last year by the Nobel-winning UN Intergovernmental Panel on Climate Change(IPC
C),according to the authors.
Rising sea levels are driven by two things:the thermal expansion of sea water,and additional water from melting sources of ice．Both processes are caused by global warming．The ice sheet that sits atop Greenland,for example,contains enough water to raise world ocean levels by seven meters,which would bury sea-level cities from Dhaka to Shanghai.
Trying to figure out how much each of these factors contributes to rising sea levels is critically important to understanding climate change,and forecasting future temperature rises,scientists say．But up to now,there has been a puzzling gap between the projections of computer-based climate models,and the observations of scientists gathering data from the oceans.
The new study,led by Catia Domingues of the Centre for Australian Weather and Climate Research,is the first to reunite the models with observed data．Using new techniques to assess ocean temperatures to a depth of 700 meters from 1961 to 2003,it shows that thermal warming contributed to a 0.53 millimeter-per-year rise in sea levels rather than the 0.32 mm rise reported by the IPC
C.
The rise in water levels is especially dangerous for small island nations and__.
A.low-lying urban areas
B.all coastal cities
C.people who live on the beach
D.Shanghai
[单选题]In a world where
it seems we already have too much to do, and too many things to think about, it
seems the last thing we need is something new that we have to learn.
But use cases do
solve a problem with requirements:with （71） declarative requirements it's hard to describe steps and sequences of
events.
Use cases, stated
simply, allow description of sequences of events that, taken together, lead to
a system doing something useful.As simple as this sounds,this is important.
When confronted only with a pile of requiements, it's often（72）to make sense of what the authors of the
requirements really wanted the system to do.In the preceding example, use cases
reduce the ambiguity of the requirements by specifying exactly when and under
what conditions certain behavior occurs;as such, the sequence of the behaviors can
be regarded as a requirement. Use cases are particularly well suited to capture
approaches. Although this may sound simple, the fact is that （73） requirement capture approaches, with their
emphasis on declarative requirements and "shall"
statements,completely fail to capture fail to capture the （74） of the system's behavior. Use cases are a
simple yet powerful way to express the behavior of the system in way that all
stakeholders can easily understand.
But,like
anything, use cases come with their own problems, and as useful as they
are,they can be （75）. The result is something that is as bad, if not worse, that the original
problem.Therein it's important to utilize use cases effectively without
creating a greater problem than the one you started with.
A.misapplied
B.applied
C.used
D.powerful
[单选题]In a world where it seems we already have too much to do,and too many things to think about,it seems the last thing we need is something new that we have to learn.But use cases do solve a problem with requirements:with__1__declarative requirements it's hard to describe steps and sequences of events.Use cases,stated simply,allow description of sequences of events that,taken together,lead to a system doing something useful.As simple as this sounds,this is important.When confronted only with a pile of requirements,it's often__2__to make sense of what the authors of the requirements really wanted the system to do.In the preceding example,use cases reduce the ambiguity of the requirements by specifying exactly when and under what conditions certain behavior occurs;as such,the sequence of the behaviors can be regarded as a requirement.Use cases are particularly well suited to capturing these kind of requirements.Although this may sound simple,the fact is that__3__requirement capture approaches,with their emphasis on declarative requirements and"shall"statements,completely fail to capture the__4__of the system's behavior.Use cases are a simple yet powerful way to express the behavior of the system in way that all stakeholders can easily understand.But,like anything,use cases come with their own problems,and as useful as they are,they can be__5__.The result is something that is as bad,if not worse,than the original problem.Therein it's important to utilize use cases effectively without creating a greater problem than the one you started with.
2、_____
A.impossible
B.possible
C.sensible
D.practical
[单选题]When an airmass is warmed from below, its stability is _______ .
A.increased
B.decreased
C.worsened
D.developed
