We can infer that the definition of natural succession the author would support would be______.
A．methods of preventing runoff of water
B．the relationship between the environment and living organisms
C．the effect of living things on the environment
D．how environmental changes change life within an ecosystem

未分类题The words of Richard Klein suggests that______.A．to adapt to a problem, one must first admit its existenceB．he admits that the IPCC report exists some problemsC．it's time for people to face global warmingD．the U.S. didn't acknowledge global warming, let alone adapting it

未分类题下列选项中，属于crm基本要求的是()。

单项选择题实验研究方法根据控制程度的不同可以分为()A文献法与内容分析法B真实验与准实验C.访谈法与问卷法D.实验室观察与自然观察

未分类题By mentioning Bangladesh in the last paragraph, the author intends to______.A．state that many countries are making precaution for global warmingB．demonstrate that Bangladesh is one of the poorest countries in the worldC．argue that the U.S. has been behind many countries preparing for global warmingD．prove that it's very important to make adaptation to global warming

未分类题交换机转发数据的三种方法是(。)