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【单选题】

Why is the environmental water flow measure important?(Please select one answer)

A.
It indicates the amount of water that is needed in a river to keep it from becoming overly enriched with nutrients (a process known as eutrophication)
B.
It indicates the amount of water that is currently in river basins worldwide
C.
It indicates how much water in rivers systems is available to be used for agriculture
D.
It indicates an estimate of the minimum amount of water that is needed in our river systems to keep ecosystems functioning
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【多选题】为了对战略行动进行必要的激励,应该做好以下工作,包括( )。

A.
正确区分战略实施阶段,明确具体工作步骤和责任
B.
根据战略目标,确立各个阶段应该取得的成果及应该达到的程度
C.
按照战略考核标准进行多方式的评价、考核
D.
对战略实施过程中领导人行为的努力程度进行正确地评价,给予奖励

【单选题】In this lecture, Professor Rockström indicates that the update to the science of planetary boundaries will make a change to the calculation of the land and water use boundaries. What is this change hi...

A.
The updated science will use an entirely ‘top-down’ approach, looking at how much land and water can be used before inducing a tipping point
B.
The updated science will use an entirely ‘top-down’ approach, looking at how much land and water must be maintained in order to maintain resilience
C.
The updated science will use an entirely ‘bottom-up’ approach. At the local scale, the level of biodiversity loss and novel entities that can be reached before inducing a tipping point will form the basis of the assessment
D.
The updated science will combine a ‘top-down’ approach with a ‘bottom-up’ approach. At the local/regional scale how much land in forest systems and freshwater in river basins must be maintained in order to sustain Earth resilience

【单选题】下列有关胸椎MR扫描技术要点与质量控制的叙述,错误的是()

A.
胸椎前方设置预饱和带,有助于减少心血管搏动及胸部呼吸运动伪影
B.
在扫描范围上、下方设置饱和带,可消除脑脊液流动伪影
C.
矢状位相位编码方向取前-后方向
D.
冠状位相位编码方向取头-足方向或左-右方向
E.
横轴位相位编码方向可取前-后方向