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  3. According to the prevailing view, Homo erectus, an ancestor of Homo sapiens, lacked the intellectual and technological sophistic

According to the prevailing view, Homo erectus, an ancestor of Homo sapiens, lacked the intellectual and technological sophistic

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问题     According to the prevailing view, Homo erectus, an ancestor of Homo sapiens, lacked the intellectual and technological sophistication to have achieved controlled use of fire; that had to wait for the emergence of H. sapiens 40,000 years ago. However, recent evidence seriously undermines this view. At two sites in Kenya, many small, lens-shaped patches of discolored earth were uncovered along with bones and stone tools of H. erectus. Analysis showed that the patches, which, like the tools and bones, dated from 1.6 million years ago, were almost certainly the result of deliberately built fires, since those fires were evidently much hotter than typical naturally occurring bush fires. The size of the patches rules out lightning strikes, which could have explained the fires’ high temperatures. Furthermore, the fires were fed by a mixture of grasses and woods that strongly deliberately collected fuel. In addition, many of H. erectus’ tools were made of basalt or quartz, stones when exposed to the intense heat near a campfire, form characteristic dimples on their surface. A recent study found that such dimples never appear on tools dating earlier than 1.6 million years ago but do consistently appear on later tools.
The temperature of the fires that produced the “lens-shaped patches” is mentioned primarily in order to
选项 A、offer an explanation for the small size of the patches
B、present evidence to support a hypothesis about the cause of those fires
C、show how scientists determined the type of fuel that fed those fires
D、present data that helped to ascertain the age of the patches
E、acknowledge that certain characteristics of those fires present an unresolved contradiction
答案B
解析 本题属于功能题。定位到第四句，可见这是一个证据，用来说明这些火是直立人刻意为之。因此选项B正确。
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