四六级考试

【单选题】 The National Academy of Sciences holds the stance that ______.
A．DNA testing should be systematized
B．only authorized laboratories can conduct DNA testing
C．the academy only is authorized to work out standards for testing
D．the academy has the right to accredit laboratories for DNA testing

网考网参考答案：B
网考网解析：
[解析] 事实细节题。国家科学院的立场要参看文章最后——句话：And in April，the National Academy of Sciences called for strict standards and system of accreditation for DNA testing laboratories．(四月份时，国家科学院要求DNA检测实验室建立严格的标准和鉴定合格体系，他们的立场便是只有权威试验室才能进行 DNA检测。)选项[B]与原文相符。选项[A]DNA测试应系统化，与文意不符；[C]、[D]文中未及。 查看试题解析出处>>