书城教材教辅科学读本(英文原版)(套装1-6册)
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第19章 第一册(19)

"I am going to tell you something very funny though. The dog perspires through his tongue. The sweat never comes out on his skin. When you see Ponto lying down in the sun, with his tongue lolling out, you will know what it means now, Norah."SUMMARY

The dog, like the cat, is fond of a piece of raw meat. He is a ?esh-eater. His teeth are just like the cat"s teeth. His jaw, too, has only one movement-up and down. He does not chew his food. His teeth are for cutting ?esh, not for chewing. The dog"s eyes have no curtain in front, and the pupil is never a long, narrow slit. He walks on his toes, and his toes are padded. He cannot draw his claws back. He makes a noise when he walks. His tongue is not rough, like the cat"s tongue. The dog perspires through his tongue.

Lesson 10

Dogs

"I say, boys," said Norah, "what should we do without our dear, faithful, old Ponto? He is such a clever, loving, sensible old fellow.""Well, I couldn"t do without him," said Fred. "Teacher says that the dog is the very best friend man has among the animals, and I"m sure of it.

"There are many kinds of dogs. First there are the Hounds. These are the best runners. They are all used in hunting.