【单选题】
A long time ago, at a national conference on biology, he cautiously ______ his new theory on life.
A.advanced
B.relieved
C.produced
D.thrust
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根据网考网移动考试中心的统计,该试题:
58%的考友选择了A选项
6%的考友选择了B选项
7%的考友选择了C选项
29%的考友选择了D选项