GRE考试

根据网考网考试中心的统计分析，以下试题在2018/4/20日GRE考试习题练习中，答错率较高，为：84%
【单选题】 Transgenic mammals that secrete monoclonals in their milk can generate one gram of antibody for roughly $100—one third the price of traditional production methods, most scientists agree, but still too expensive to be______.
A．(A) revolutionary
B．(B) efficient
C．(C) cost-effective
D．(D) regarded
E．(E) feasible

网考网参考答案：C，答错率：84%
网考网试题解析：
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