数学思想的表达，把自己的信息以某种形式(直观的或非直观的、口头的或书面的、普通语言或数学语言)表达出来。()

The are prime victims of dishonest door－to－door salesman and () advertising, and buy defective hearing aids, dance lessons, useless 'Medicare insurance supplements'.

A、diagnostic
B、fraudulent
C、adversity
D、penalize

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小关节对称性病变呈畸型改变是___________的特征性改变。 点击查看答案