The topic sentence of Paragraph 3 is ______

单选题The topic sentence of Paragraph 3 is _______ .

主旨题型
第三段的主题句在句首和句尾：文化预期同样也影响到我们对所看事物的选择。………有些文化可能强调的是头发的颜色、皮肤的肌理，有些文化注重鼻子或嘴巴的形状，还有些文化可能注重眼睛的样子。中间部分是解释及举例；因此D为答案。

1We have to filter sensory input into recognizable images because ________ .

2Which of the following illustrates the concept of filtering in Paragraph 3 ?

3In the passage, all the following are the true factors to affect our perceptions EXCEPT ________ .