单选题We learn from the last sentence of the passage that _____.Athe availability of raw materials also depends on warBcontinued expansion of scientific knowledge will prolong the usage of raw materialsCpolitical and social will also decide the availability of raw materialsDwar and population are severe problems
单选题
We learn from the last sentence of the passage that _____.
A
the availability of raw materials also depends on war
B
continued expansion of scientific knowledge will prolong the usage of raw materials
C
political and social will also decide the availability of raw materials
D
war and population are severe problems
参考解析
解析：
文章最后一句说，即使通过技术手段使这些财富变为可用时，不断加速增长的人口和战争带来的巨大浪费也是需要加以考虑的复杂因素。可见社会问题（人口）和政治问题（战争）也会影响自然资源的可利用性，故答案为C。注意，选项D的陈述也是正确的，但全文都是关于自然资源的，所以D是离题的。
文章最后一句说，即使通过技术手段使这些财富变为可用时，不断加速增长的人口和战争带来的巨大浪费也是需要加以考虑的复杂因素。可见社会问题（人口）和政治问题（战争）也会影响自然资源的可利用性，故答案为C。注意，选项D的陈述也是正确的，但全文都是关于自然资源的，所以D是离题的。
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