2. 外语
  3. The passage is primarily concerned with______ According to the passage, which of the following statements about the two-categor

The passage is primarily concerned with______ According to the passage, which of the following statements about the two-categor

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问题 The passage is primarily concerned with______
According to the passage, which of the following statements about the two-category hypothesis is likely to be true?
选项 A、It is promising because it explains the presence of true bacteria-like organisms such as organelles in eukaryotic cells.
B、It is promising because it explains why eukaryotic cells, unlike prokaryotic cells, tend to form multicellular organisms.
C、It is flawed because it fails to account for the great variety among eukaryotic organisms.
D、It is flawed because it fails to account for the similarity between prokaryotes and eukaryotes.
E、It is flawed because it fails to recognize an important distinction among prokaryotes.
答案E
解析 The best answer is E. According to the passage, the two-category hypothesis, which assumed “that all living things could be divided into two…categories,” (lines 1-2) now “seems fundamentally wrong” (line 27) because it does not account for evidence that two kinds of prokaryotic organisms exist: true bacteria and “a distinct evolutionary branch,” archaebateria (line 40). Thus, the hypothesis is said to ignore an important distinction among prokaryotes, as E states. Choice A is wrong because the passage does not even mention bacteria alike organisms existing within eukaryotic cells. B contradict the passage, which states that “many unicellular organisms… are eukaryotic.” C and D are wrong because each identifies as a flaw the failure to “account for” conditions that the passage indicates the hypothesis accounted for.
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