Like you,most animals have eyes. But how and what they see can be very different. Each animal has the kind of eyes it needs for the way of life it leads.

   This fish is called a four-eyed fish,but it really has only two eyes. The top half of each eye sees above the water. The bottom half watches what is happening in the water.

   A chameleon(變色龍) can move its eyes two ways at once. One eye looks up,while the other looks down. One can look left,while the other looks right. That makes it easier for a chameleon to find food and stay safe.

   A bee has five eyes. The three small eyes on the top of its head can tell if it's light or dark. The two large eyes can see objects.

Most spiders have eight eyes but they cannot see well. Instead,they use tiny hairs on their bodies to taste,smell,hear and feel the world. They can find an object just by feeling the way air moves around it.

   During the day,it's hard to see the black pupil(瞳孔) at the center of a crocodile’s(鱷魚的) eye. It's a small,thin line. At night,the pupil changes its shape. It becomes large and round to let in more light.

根據(jù)材料內(nèi)容判斷正(T) 誤(F) 。

() 46. A four-eyed fish can see above the water and under the water at the same time.

() 47. A chameleon has more eyes than a bee.

() 48. Spiders “see” an object by using tiny hairs on their bodies,t

() 49. The pupil of a crocodile's eye is larger at night than during the day.

() 50. The more eyes an animal has,the more clearly it can see.

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