生物量(Biomass)
第1题:
The author seems to be mainly concerned with most fisheries’ ________.
[A] management efficiency
[B] biomass level
[C] catch-size limits
[D] technological application
第2题:
鱼类对浮游植物的影响主要取决于下列因素()
A、鱼类对食物的选择性
B、鱼类生物量
C、浮游植物生物量
D、浮游植物密度
第3题:
下列有关生物量的叙述错误是()。
A.生物量是指单位面积内动物、植物等生物的总是重量
B.生物量与生产量是相同的概念
C.生物量随时间而逐渐积累,可表现为生物量的增长
D.生物量只指有生命的活体
第4题:
由于森林占陆地植被生物量的60%左右,因此,森林植被生物量的准确估算对估算全球陆地植被碳库尤为关键。
第5题:
The author seems to be mainly concerned with most fisheries’
A.management efficiency B.biomass level C.catch-size limits D.technological application.
第6题:
下列有关生物量的说法正确的是( )
A.陆地生态系统中最大的是热带雨林
B.冻土带的生物量最低
C.在水生生态系统中,水的最表层的生物量最大
D.森林生态系统中,树冠的最顶部生物量最大
第7题:
Dr Myers and other researchers hold that
A. people should look for a baseline that can’t work for a longer time. B. fisheries should keep the yield below 50% of the biomass C. the ocean biomass should restored its original level. D. people should adjust the fishing baseline to changing situation
第8题:
Dr. Myers and other researchers hold that ________.
[A] people should look for a baseline that can’t work for a longer time
[B] fisheries should keep the yield below 50% of the biomass
[C] the ocean biomass should restored its original level
[D] people should adjust the fishing baseline to changing situation
第9题:
第10题:
下列有关生物量的叙述错误是()。