______ 1895 did Cornell University begin to offer a degree in ornithology （鸟类学).A．Not u

______ 1895 did Cornell University begin to offer a degree in ornithology (鸟类学).

A．Not until

B．Not since

C．Until

D．In

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第1题

听力原文：During the early American colonial years, corn was more plentiful than wheat, so

听力原文： During the early American colonial years, corn was more plentiful than wheat, so corn bread was more common than wheat bread. Friendly Indians showed colonists how to grow corn and how to prepare it for food and pioneer women then improved the Indian cooking techniques. When people traveled, they went on foot or horseback, sleeping and eating in the forests. They carried corn bread for sustenance. The corn bread came to be called journeyeake. Later when roads and taverns were built and stagecoaches carried passengers, journeycake became johnnycake, a name many easterners still use for corn bread. The kinds of bread made with cornmeal were and still are almost without limit. Every region has its specialties.

From the start, southerners showed a preference for white eorm:neal, northerners for yellow. And pioneers on the frontier, when they ran out of yeast, made salt-rising bread. They stirred together water, a little water ground cornmeal, potatoes, and salt. They set the mixture, uncovered, in a warm place until it absorbed bacteria from the air and began to ferment. Then they removed the potatoes and used the liquid as leavening for their bread, made with white flour.

(33)

A．The colonists preferred corn bread.

B．Corn was more abundant.

C．The colonists did not know how to make wheat bread.

D．Corn bread did not spoil as rapidly as wheat bread did.

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第2题

For as long as humans have raised crops as a source of food and other products, insects ha

ve damaged them. Between 1870 and 1880, locusts ate millions of dollars' worth of crops in the Mississippi Valley. Today in the United States the cotton boll weevil damages about 300 million dollars' worth of crops each year. Additional millions are lost each year to the appetites of other plant-eating insects. Some of these are corn borers, gypsy moths, potato beetles, and Japanese beetles. In modern times, many powerful insecticides(杀虫剂) have been used in an attempt to destroy insects that damage crops and trees. Some kinds of insecticides, when carefully used, have worked well. Yet the same insecticides have caused some unexpected problems. In one large area, an insecticide was used against Japanese beetles, which eat almost any kind of flower or leaf. Shortly afterward, the number of corn borers almost doubled. As intended, the insecticide had killed many Japanese beetles. But it had killed many of the insect enemies of the corn borer as well. In another case, an insecticide was used in Louisiana to kill the troublesome fire ant. The insecticide did not kill many fire ants. It did kill several small animals. It also killed some insect enemies of the sugarcane borer, a much more destructive pest than the fire ants. As a result, the number of sugarcane borers increased and severely damaged the sugarcane crop. To be sure that one insect pest will not be traded for another when an insecticide is used, scientists must perform careful experiments and do wide research. The experiments and research provide knowledge of the possible hazards an insecticide may bring to plant and animal communities. Without such knowledge, we have found that nature sometimes responds to insecticides in unexpected ways. An insecticide was used in Louisiana to kill the troublesome______.

A.corn borer

B.Japanese beetle

C.gypsy moth

D.fire ant

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第3题

Would you eat a bacon, lettuce and love apple sandwich？ You probably have eaten many of th

em. Love apple was the name used many years ago for the tomato.

The tomato is originally an American plant. It was found in South America by early Spanish explorers. The word tomato comes from the native Nahuatl word tomatl. But when it moved north, the plant earned a different name. Remarkably, the settlers in North America thought it was poisonous. They believed that to eat it was surely to die. It was said that deserted suitors would threaten to eat a tomato to cause their coldhearted lovers-regret. Because of this legend, the settlers called the tomato a "love apple." While people enjoyed other native plants such as corn and sweet potatoes, everyone avoided the tomato.

No one knows who first dared to eat a tomato. Perhaps someone was brave enough, or lovesick enough, to try out the truth of the rumors. Of course, whoever ate this fruit was perfectly safe. No one died from eating a love apple. Still, it was many years before the people fully believed that the tomato was a safe, and even good food. But its use did become common, and the plant was sent across the ocean to become part of many traditional European dishes.

The language from which we derived the word tomato is______.

A．Portuguese

B．Spanish

C．Nahuati

D．European

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第4题

My I have two ______ instead of beans, please？A、corn's earB、corn earsC、ear of corns

My I have two ______ instead of beans, please？

A、corn's ear

B、corn ears

C、ear of corns