考博考试

试题来源：考博英语-141
【单选题】 In the passage, the author is primarily concerned with______.
A．rejecting an earlier explanation for the longevity of certain brachiopod species
B．reevaluating the implications of uniformity among existing brachiopod species
C．describing the varieties of environmental change to which brachiopods are vulnerable
D．reconciling opposing explanations for brachiopods' lack of evolutionary success

参考答案：B
网考网解析：
第一段中作者首先提出以往生物学家对uniformity的看法，即unable to compete successfully with other marine organisms ... 查看试题解析出处>>