Scientists engaged in animal studies have collected
A. enough data on how animals speak human languages
B. none of the data on animals? ability to communicate
C. 1ess data on how animals communicate between species
D. some data on animals? tendency to talk to humans
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眼睛由于津液亏少,失去其濡润滋养作用所出现的以燥化为特征的征候,称为干眼症。()
按照WHO标准,低视力是指双眼中视力较好眼的矫正视力在0.05以下。()
儿童期高度远视或散光未及时矫正常导致屈光不正性弱视。()