书城教材教辅科学读本(英文原版)(套装1-6册)
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第170章 第二册(87)

"I suppose, now, when we speak of his prey, you would like to know something about his teeth. Theyare long, sharp, and pointed. They are just fitted for seizing his victim and tearing its flesh-not for chewing. He catches and kills frogs, fieldmice, and small snakes, as well as earthworms and beetles."SUMMARY

The mole lives under the ground. His strong, front paws are his shovels for digging. He makes a fine house underground. He feeds upon worms, grubs, and beetles, which he ?nds there. He has sharp teeth for tearing and cutting ?esh, but no chewing teeth. His fur is thick and warm, and does not ruffle up. His ears are very sharp.

Lesson 39

Silver

"You remember, Norah, that silver and gold do not rust?""Oh yes," said Norah. "We call them precious metals." "I want you to look at mother"s silver spoon.

What can you tell me about it?"

"It is white," said Norah, "and has a very high polish." "Yes," said Fred, "and now let us put the spoon by the side of these pieces of tin and zinc. The whiteness of the silver is not the yellowish-white of the tin, nor the bluish-white of the zinc. Silver ispure white.