For the experiment, the participant looked at a computer screen. One by one, 80 wordsflashed on the screen for about 1/300th of a second each. They flashed at so small a size that thestudents could only consciously perceive. A quarter of the words were food-related. After eachword, each person was asked how bright the word was and asked to choose which of two wordstheyd seen -- a food-related word like cake or a neutral word like boat. Each word appearedtoo briefly for the participant to really read it.

　　Hungry people saw the food-reiated words as brighter and were better at identifying food-related words. Because the word appeared too quickly for them to be reliably seen, this meansthat the difference is in perception , not in thinking processes, Radel says.

This is something great to me. Humans can really perceive what they need or what theystrive for. From the experiment, I know that our brain can really be at the disposal of ourmotives and needs, Radel says.

Poorer children and hungry people are mentioned in Paragraph 2 to show_______.

A．humans senses are influenced by whats going on in their heads

B．they have sharper senses than others

C．they lose their senses because of poverty and hunger

D．humans senses are affected by what they see with their eyes

37、 There was a delay in Radels experiment because

A．he needed more students to join

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