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【多选题】
生物多样性减少的主要原因包括______。A.
对生物物种的强度捕猎和采集等过度利用活动，使野生物种难以正常繁殖
B.
外来物种的大量引进和侵入，大大改变了原有的生态系统，使原有物种受到威胁
C.
无控制的旅游、科考、登山、攀岩使一些尚未受到人类影响的自然生态系统受到破坏
D.
世界人口的剧增和人类社会的过度消耗
E.
全球变暖导致气候在比较短的时间内发生较大的变化，自然生态系统将无法适应，而使一些物种灭绝
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【简答题】三极管 基本放大电路的三种组态分别是: _____ 放大电路、 _____ 放大电路和 _____ 放大电路。
【简答题】In this age of increased academic pressure and decreasedinstitutional budgets, do high-profile, big-budget college athletics programsstill make sense? In order to make an informed decision, you must w...
【判断题】The challenge to Walmart in China mentioned by its CEO is China's big geography. In other words, among different cities, helping customers save money and serving them in a local way are challenging to...
A.
正确
B.
错误
【简答题】三极管放大电路的三种基本组态是_______、______和共射。
【简答题】三极管放大电路的三种基本组态是( )、( ) 和共射放大电路。
【单选题】This skill involves seeing the big picture and the interrelatedness of the parts. A basic anthropological strategy for understanding other cultures is to look at a cultural feature from within its ori...
A.
The study of different cultures provides a much better understanding of one ’ s own.
B.
Studying cultural anthropology makes us more aware of other cultures as well as our own.
C.
Studying cultural anthropology helps develop a broad perspective.
【简答题】二、定义判断。每道题先给出一个定义，然后列出四种情况，要求你严格依据定义，从中选出一个最符合或最不符合该定义的答案。注意：假设这个定义是正确的。不容置疑的。 第 61 题 环境标准是指国家根据人体健康、生态平衡、社会经济发展对环境结构、状态的要求，在综合考虑本国自然环境特征、科技水平和经济条件的基础上，对环境要素间的布局和各环境要素的组成及进行环保工作的某些技术要求加以限定的规范。下列规定中不属于...
【简答题】4. My friend Stuart
was born ( on / in / at ) December 31. In other
words, he was born ( in / on / at ) New
Year's Eve. Naturally he has a big party every year ( in / at / on )
his birthday!
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