2004年5月TOEFL试题含答案2
29. Until the twentieth century, pendulum clocks were calibrated against the rotation of earth by taking astronomically measurements.
30.The rapid growth of the world’s population over the past 100 years have led
to a great increa in the acreage of land under cultivation.
31.In the eighteenth century, the Pawnees, descendants of the Nebraska culture, lived in 项目可行性
ncaavillages sizeable on the Loup and Platte rivers in central Nebraska.
32.The attraction of opposite charges is one of the force that keep electrons in orbit around of nucleus of an atom.
33.Of every the major traditions of wood carving, the one that is clost in structure to the tree is the crest pole made by the Native Americans of the Northwest coast.
34.Many of the fine-grained varieties of dimentary rocks known as shales yield oil
when distilled by hot.
35.In 1820 there were only 65 daily newspapers in the united states, which total daily circulation of perhaps 100,000.
36.The Milky Way galaxy includes the Sun, its planets, and rest of the solar system, along with billions of stars and other objects.
37.Some of sharpshooter Annie Oakley’s exploits with a gun are almost unbelievable when
春天什么时候开始it comes to accuracy, speed of firing ,and endure.
38.Evidence from ancient fossils indicates the scorpion may had been among the first land animals.
39.Jetties, piers designed to aid in marine navigation, are constructed primary of wood, stone, concrete, or combinations of the materials.
40.The Barnes Foundation in Merion, Pennsylvania, was chartered in 1922 to promotion art education by providing art class and by establishing a publishing program.
Section Three: Reading Comprehension
Question 1-10
All mammals feed their young. Beluga whale mothers, for example, nur their calves for some twenty months, until they are about to give birth again and their young are able to find their own food. The behavior of feeding of the young is built into the reproductive system. It is a nonelective part of parental care and the defining feature of a mammal, the most important thing that mammals-- whether marsupials, platypus, spiny anteaters, or placental mammals -- have in common.
But not all animal parents, even tho that tend their offspring to the point of hatching or birth, feed their young. Most egg-guarding fish do not, for the simple reason that their young are so much smaller than the parents and eat food that is also much smaller than t
he food eaten by adults. In reptiles, the crocodile mother protects her young after they have hatched and takes them down to the water, where they will find food, but she does not actually feed them. Few incts feed their young after hatching, but some make other arrangement, provisioning their cells and nests with caterpillars and spiders that they have paralyzed with their venom and stored in a state of suspended animation so that their larvae might have a supply of fresh food when they hatch.三只熊的故事
For animals other than mammals, then, feeding is not intrinsic to parental care. Animals add it to their reproductive strategies to give them an edge in their lifelong quest for descendants. The most vulnerable moment in any animal's life is when it first finds itlf completely on its own, when it must forage and fend for itlf. Feeding postpones that moment until a young animal has grown to such a size that it is better able to cope. Young that are fed by their parents become nutritionally independent at a much greater fraction of their full adult size. And in the meantime tho young are shielded against the vagaries of fluctuating of difficult-to-find supplies. Once a species does take the step of feeding its young, the young become totally dependent on the extra effort. If both parents
act的意思
are removed, the young generally do no survive.
直销渠道1. What does the passage mainly discuss?
A. The care that various animals give to their offspring.
B. The difficulties young animals face in obtaining food.
C. The methods that mammals u to nur their young.
D. The importance among young mammals of becoming independent.
2. The author lists various animals in line 5 to
A. contrast the feeding habits of different types of mammals
B. describe the process by which mammals came to be defined
C. emphasize the point that every type of mammal feeds its own young
D. explain why a particular feature of mammals is nonelective
3. The word "tend" in line 7 is clost in meaning to
A. sit on
B. move
数学联赛C. notice
D. care for
4. What can be inferred from the passage about the practice of animal parents feeding their young?
A. It is unknown among fish.
B. It is unrelated to the size of the young.
