［A］ New plants and animals then move into the area and begin to grow.［B］ Just 2 per

A．Scientists Searching for Metals with Special Power

B．New Methods of Searching for Trees and Bushes

C．Gold Could Be Found by Trees and Plants

D．A New Method of Searching for Minerals: Using Trees and Plants

T ______.

A．they are eager to build new nuclear power plants

B．they have totally forgotten the Chernobyl accident 25 years ago

C．they have improved their nuclear power plants

D．they want energy independence

nts and animals into new regions, sometimes deliberately, sometimes unconsciously. He is covering huge areas with new kinds of plants, or with houses, factories, slag-heaps and other products of his civilization.He exterminates some species on a large scale, but favours the multiplication of others.In brief,he has done more in five-thousand-year to alter the biological aspect of the planet than has nature in five million.

Which of the following statement shows Henry, the husband’s practicality？

A.He likes it when seeing her “strong new crops”

B.He compliments her gift of raising plants

C.He talks business with the men in the tractor shed

D.He wish she would work out in the orchard and raise some big apples

［A］ New plants and animals then move into the area and begin to grow.

［B］ Just 2 percent of the sunlight goes through the many layers of leaves and branches above, so understory plant species have developed special traits to cope with low light levels.

［C］ On a smaller scale, large mammals, such as elephants, regularly destroy rain forest vegetation in the Congo River Basin in Africa.

［D］ An understory of shorter trees and a lacework of woody vines, or lianas, produce a forest of such complex internal architecture that many animals, including some sizable ones, rarely or never descend to the ground.

［E］ Less than one percent of the trees in the forest reside in the canopy and emergent layers.

［F］ Because more light penetrates the canopy, however, the vegetation of the understory and forest floor is better developed than in the tropics.

［G］ The rich, green canopy is teeming with life, and forest researchers have developed ingenious methods for accessing this mysterious ecosystem.

请根据以下内容回答 60～64 题

A．An organ of higher plants， usually subterranean and having several functions，including the absorption and conduction of water and dissolved minerals， food storage，and anchorage of the plant in the soil. It is distinguished from the stem by its structure，by the manner in which it is formed， and by the lack of such appendages as buds and leaves.

B．It grow horizontally， as a food-storing organ， beneath the surface of the ground， and enables a plant to reproduce itself.It has nodes， buds，and tiny leaves and does not die when cut； replanted， it yields new plant.

C．both A and B

D．neither A nor B

第 60 题 一种起运输作用的器官是（）

［A］ New plants and animals then move into the area and begin to grow.

［B］ Just 2 percent of the sunlight goes through the many layers of leaves and branches above, so understory plant species have developed special traits to cope with low light levels.

［C］ On a smaller scale, large mammals, such as elephants, regularly destroy rain forest vegetation in the Congo River Basin in Africa.

［D］ An understory of shorter trees and a lacework of woody vines, or lianas, produce a forest of such complex internal architecture that many animals, including some sizable ones, rarely or never descend to the ground.

［E］ Less than one percent of the trees in the forest reside in the canopy and emergent layers.

［F］ Because more light penetrates the canopy, however, the vegetation of the understory and forest floor is better developed than in the tropics.

［G］ The rich, green canopy is teeming with life, and forest researchers have developed ingenious methods for accessing this mysterious ecosystem.

she testified to the New Zealand government that a genetically modified (GM) bacterium could cause serious damage if released.

The New Zealand Life Sciences Network, an association of pro GM scientists and organizations, says the view expressed by Elaine Ingham, a soil biologist at Oregon State University in Corvallis, was exaggerated and irresponsible. It has asked her university to discipline her.

But Ingham stands by her comments and says the complaints are an attempt to silence her. "They're trying to cause trouble with my university and get me fired", Ingham told New Scientist.

The controversy began on 1 February, when Ingham testified before New Zealand's Royal Commission on Genetic Modification, which will determine how to regulate GM organisms. Ingham claimed that a GM version of a common soil bacterium could spread and destroy plants if released into the wild. Other researchers had previously modified the bacterium to produce alcohol from organic waste. But Ingham says that when she put it in soil with wheat plants, all of the plants died within a week.

"We would lose terrestrial(陆生的) plants...this is an organism that is potentially deadly to the continued survival of human beings," she told the commission. She added that the US Environmental Protection Agency (EPA) canceled its approval for field tests using the organism once she had told them about her research in 1999. But last week the New Zealand Life Sciences Network accused Ingham of "presenting inaccurate, careless and exaggerated information" and "generating speculative dooms-day scenarios(世界末日的局面) that are not scientifically supportable". They say that her study doesn't even show that the bacteria would survive in the wild, much less kill massive numbers of plants. What's more, the network says that contrary to Ingham's claims, the EPA was never asked to consider the organism for field trials.

The EPA has not commented on the dispute. But an e-mail to the network from Janet Anderson, director of the EPA's bio-pesticides(生物杀虫剂)division, says "there is no record of a review and/or clearance to field test" the organism.

Ingham says EPA officials had told her that the organism was approved for field tests, but says she has few details. It's also not clear whether the organism, first engineered by a German institute for biotechnology, is still in use.

Whether Ingham is right or wrong, her supporters say opponents are trying unfairly to silence her;

"I think her concerns should be taken seriously. She shouldn't be harassed in this way," says Ann Clarke, a plant biologist at the University of Guelph in Canada who also testified before the commission. "It's an attempt to silence the opposition."

The passage centers on the controversy ______.

A．between American and New Zealand biologists over genetic modification

B．as to whether the study of genetic modification should be continued

C．over the possible adverse effect of a GM bacterium on plants

D．about whether Elaine Ingham should be fired by her university