The Greatest Mystery of Whales
The whale is a mammalwarm-blooded, air-breathing, giving birth to its young alive1, sucking themand, like all mammals, originated on land. There are many signs of this. ___D_1____ from flippers, used for steering and stability, are traces of feet.
Immense strength is built into the great body of the big whales, and in fact most of a whales body is one gigantic muscle. The blue whales pulling __A__2____ has been estimated at 400 horsepower. One specimen was reported to have __C__3___ a whaling vessel for seven hours at the __B__4____ of eight knots.
An enraged whale will attack a ship. A famous __C__5____ of this was the fate of whaler Essex, which was sunk ___6__A_ South America early in the last century. More recently, steel ships have had their plates buckled2 in the same way. Sperm whales were known to __B___7____ the old-time whaleboats in their jaws and crush them.
The greatest mystery of whales is their diving ability. The sperm whale can ____8___C_ the bottom for his favourite food, the octopus. _A__9___ he is known to go as far down as 3,200 feet, where the pressure is 1,400 pounds, to the square inch. Doing ____10__A__ he will remain submerged as long as one hour. Two feats are involved in this: storing up enough _B___11____ and withstanding the great change in pressure. Just __C__12___ he does it scientists have not determined. It is believed that some of the oxygen is stored in a special system of blood vessels, rather than just held3 in the lungs. And __A__13____ that a special kind of oil in his head is some sort of compensating mechanism that automatically adjusts the internal pressure of his body. But_C____14_____ you cant bring a live whale4 into the laboratory for study, no one __B___15__ just how these things work.
1. A) Their B) His C) Theirs D) Its
2. A) strength B) width C) height D) length
3. A) eaten B) crashed C) towed D) lifted
4. A) distance B) rate C) voyage D) sail
5. A) picture B) film C) example D) book
6. A) off the coast of B) of the coast of C) away the coast of D) in the coast of
7. A) hit B) seize C) damage D) overturn
8. A) sink to B) rest on C) dive to D) hide on
9. A) In that search B) Because of this C) In spite of that D) In support of this
10. A) so B) such C) above D) the same
11. A) air B) oxygen C) energy D) heat
12. A) what B) where C) how D) when
13. A) it is believed B) he believes C) we believe D) it believes
14. A) because of B) due to C) since D) owing to
15. A) communicates B) knows C) hears D) develops
英文睡前故事 第81集:The Cow That Laid an Egg
伊索寓言《两个年轻人和熊的故事》
少儿英语故事视频大全 第7期:聪明的老猫头鹰
少儿英语故事视频大全 第13期:荡秋千
伊索寓言之《农夫和蛇的故事》
英文睡前故事 第102集:When Lulu Went to the Zoo
少儿英语故事视频大全 第12期:当杰克是个乖孩子时
英文睡前故事 第91集:The Star Faced Crocodile
三国故事:蒋干盗书
英文睡前故事 第73集:Tappity Tap What Was That
少儿英语故事视频大全 第1期:白云 Clouds
英文睡前故事 第105集:Winnies Magic Wand
英文睡前故事 第103集:Winnie in Winter
小鹰的故事
英文睡前故事 第87集:The Magic Shoebox Farm
英文睡前故事 第71集:Super Daisy and the Peril of Planet Red Fox
英文睡前故事 第86集:The Little Star Who Wished
英文睡前故事 第77集:The Best Gift of All
三国故事:计取陈仓
英文睡前故事 第63集:Ruby Sings the Blues
英文睡前故事 第99集:What Does Daddy Do
英文睡前故事 第72集:Tabby McTat
英文睡前故事 第67集:Six Dinner Sid
英文睡前故事 第75集:That Pesky Rat
英文睡前故事 第76集:That Rabbit Belongs to Emily Brown
英文睡前故事 第93集:Thump Quack Moo
英文睡前故事 第65集:Sidney the Little Blue Elephant
英文睡前故事 第84集:The Hipponotamus
英文睡前故事 第101集:What Pet to Get
英文睡前故事 第104集:Winnies Amazing Pumpkin
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |