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  3. According to the research of NCAR, if the concentrations were held steady at 2000 levels, By "at best, the results point to the

According to the research of NCAR, if the concentrations were held steady at 2000 levels, By "at best, the results point to the

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问题 According to the research of NCAR, if the concentrations were held steady at 2000 levels,
By "at best, the results point to the least change people can expect",(Paragraph 3) the researchers try to tell us that
选项 A、the impact of climate change is relatively minor.
B、the global warming is inevitable in the near future.
C、concentrations of greenhouse gases cannot beheld steady.
D、the atmospheric conditions will be better than people think.
答案B
解析 本题问通过"at best, the results point to the least change people can expect",研究者想表达什么深层意思。上文提出到国家大气研究中心两位研究者的实验表明，即使温室气体在大气中的浓度控制在2000年的水平,气候还是会变暖。上一句中说"The two researchers add that far from holding steady, concentrations of green house gases continue to rise. ",表明温室气体在大气中的浓度本身也很难稳定在某一水平不变。在本句首的"Thus"引出由此得出的推断，说明全球气候变暖在不久的将来是不可避免的。且此句的后一句"The idea that some level of global climate change from human activities is inevitable is not new; "承接上句再次明确表述了这种不可避免性。故"全球变暖在不久的将来不可避免"正确。温室气体的浓度不能保持在一个稳定水平上：上一句"far from holding steady, concentrations of greenhouse gases continue to rise. "已表达了这个意思，这是本句的前提，也是一个客观的事实，而不是研究者想要表达的深层意思。
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