Low reproductive rate C. Their preference for cold climate D. High adaptability to different E. nvironments 相关知识点: 试题来源: 解析 B。解析:大熊猫濒危的一个主要因素是繁殖率低。选项A,体型大不是其濒危的主要原因;选项C,它们对寒冷气候的偏好不是导致濒危的关键因素;选项D,大熊猫对不同环境的...
Once the wild were on the verge ofextinction, the natural ecology be ruined. 一旦野生动物趋进灭亡, 大自然的生态环境也将随之毁灭. 期刊摘选 The rate of speciesextinctionalready appears to be accelerating. 而物种灭绝的速率,也已经开始上升.
【答案】Many wild animals are in danger of extinction and die out at an alarming rate.【核心短语/词汇】in danger of 有...的危险;die out 灭绝;at an alarming rate 以惊人的速度【解析】根据题干,“许多野生动物正面临灭绝的危险,以惊人的速度灭绝。”,结合上下文和所给汉语意思可知,此处表示“许多野...
The numbers of small-ranged species are increasing quickly, even in well-known taxa. They are geographically concentrated and are disproportionately likely to be threatened or already extinct. Current rates of extinction are about 1000 times the likely background rate of extinction. Future rates ...
The world’s insects are going down the path of extinction,threatening a“catastrophic collapse of nature’s ecosystems”,according to the first global scientific review.More than 40%of insect species are declining and third are endangered,the analysis found.The rate of extinction is eight times ...
While correlates of microchiropteran extinction risk are the same as in the order as a whole, megachiropteran extinction is correlated more with reproductive rate and less with wing morphology. Bat extinction risk is not randomly distributed phylogenetically: closely related species have more similar ...
47.C 词义猜测题 根据前一句Birds enjoy a relatively slow rate of extinction but a new study suggests that rate might be severely underestimated(低估).可知研究表明以前鸟类灭绝率被低估了,如果不采取措施,灭绝率会飞速上升,故skyrocket的意思是迅速增加,故答案为C48.B 细节理解题 根据Taking these points ...
The method we used is based on a formula of the mean time to population extinction derived for a stochastic differential equation (the canonical model). The intrinsic rate of natural population growth was estimated from an exponentially growing population, and the intensity of the environmental ...
Using cleaner, more natural sources of energy tochange the way we work and travel.D. All the above.Ⅲ.句式分析1. Although it is not unusual for species to die outnaturally, the rate at which this is now happening iscause for concern.【分析】本句although引导,意为“尽管”at which为“...
摘要: From 1900-2010, freshwater fish species in North America went extinct at a rate 877 times faster than the rate found in the fossil record, while estimates indicate the rate may double between now and 2050. This new information comes from a US Geological Survey study...