FollowsMorgan,asinglemotherofthreewithabrilliantmind,assherearrangessomeevidenceduringhershiftasacleanerforthepolicedepartment,aidingintheresolutionofanunsolvablecase.

FollowsMorgan,asinglemotherofthreewithabrilliantmind,assherearrangessomeevidenceduringhershiftasacleanerforthepolicedepartment,aidingintheresolutionofanunsolvablecase.

某轧钢厂老工人孟长有，经过三年的刻苦钻研，发明了反围盘，改善生产条件，大大提高了生产率，说明了工人阶级无穷的潜在力量。

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