It is difficult to figure a g ___population of polar bears as much of the range has been poorly studied.相关知识点: 试题来源: 解析 答案见解析 根据句意,由于对许多区域调查得不够充分,很难计算出全球北极熊的数量。结合首字母,考虑global"全球的",根据后面的名词population可知应用形容词修饰名词。 ...
4. It is difficult to figure out a global(globe)population of polar bears as much of the range has been poorly studied. 相关知识点: 试题来源: 解析 答案见上4.global[提示:句意:由于对大部分北极熊活动范 围的研究甚少,很难计算出全球北极熊的数量。 修 饰名词 population 应用形容词做定语。
Until recently, the sea ice habitat of polar bears was understood to be variable, but environmental variability was considered to be cyclic or random, rather than progressive. Harvested populations were believed to be at levels where density effects were considered not significant. However, because ...
What is the population of polar bears? Polar Bear Populations: Polar bears, also known by their scientific name,Ursus maritimus, are the largest bears in the world. These bears are strong swimmers and have an extra thick coat to protect them in their snowy and icy marine habitats. They can...
Now, researchers have discovered a unique group of polar bears who’ve found an innovative way to survive in the absence of sea ice: By hunting from the ice that breaks off glaciers. The bears live in southeast Greenland and are a genetically distinct subpopulation, which...
It is difficult to figure out a global population of polar bears as much of the range has been(poor) studied; however, biologists calculate that there are about 20,000-25,000 polar bears worldwide.(所给词的适当形式填空) 相关知识点: ...
5. It is difficult to figure(figure) out a global population of polar bears as much of the range has been poorly studied. 相关知识点: 试题来源: 解析 答案见上2. to figure " It is difficult to do sth." 于中It作形式主语,后面的不定式短 语为真正的主语 ...
Climate change has been identified as a major driver of habitat change, particularly for sea ice-dependent species such as the polar bear ( Ursus maritimus ). Population structure and space use of polar bears have been challenging to quantify because of their circumpolar distribution and tendency ...
A Selection of Papers from the Fourth International Conference on Bear Research and Management, Kalispell, Montana, USA, February 1977 || Preliminary Analy... KJS Lindzey - 《Bears Their Biology & Management》 被引量: 0发表: 1980年 A Selection of Papers from the Fourth International Conference ...
is difficult to figure out a global population of polar bears as much of the range has been poorly studied.(用适当的词填空) 相关知识点: 试题来源: 解析 It 【详解】 考查固定句式。句意:由于对北极熊活动范围的研究甚少,因此很难确定全球范围内的北极熊数量。it is+adj+to do意为“做某事……...