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发布时间:2024-06-28 04:29:53

[单项选择]Not until three years ago ______ to work outside.
A. he began
B. he begins
C. began he
D. did he begin

更多"Not until three years ago ______ to"的相关试题:

[单项选择]

Passage Three Until two years ago, Clearing, Illinois was a tranquil suburb of Chicago. But residents grew alarmed when they noticed armed teenagers on the streets, giving gang signals and shouting at passing cars. Then came a series of burglaries and graffiti messages on store- fronts. By the time local authorities realized they had a gang problem, it was too late. Last December, two 13-year-old girls were shot outside their school as they sat in a car with two members of a local gang, the Ridgeway Lords. Nearly all 50 states have recently passed laws that allow youths aged 14-17 to be tried in court as adults. In about 25 states they have passed laws to punish parents for their children’s behavior. And in 146 of the nation’s largest cities, they have imposed curfews to reduce juvenile violence. When you look at the spectacular rise of violent crime among young people recently, it’s easy to understand the concern. Over the past decade, there ha
A. A famous band.
B. A gang.
C. A prison.
D. A unit.

[单项选择]Passage Three
Three years ago, researchers announced the discovery of human genes that were capable of turning ordinary cells into malignant ones. The news met with some skepticism. Experts asked how a single gene could cause such a dramatic change. Why does cancer take years or even decades to develop if it is caused by such a simple and direct process In last week’s issue of the, three research teams answered those questions by setting forth a new model for understanding the role of oncogenes in cancer.
Each group found that it does in fact take more than a single gene to produce cancer in normal cells. Teams at M. I. T and Cold Spring Harbor Laboratory on Long Island, N. Y. , reported that they could induce cancer in normal rat cells only by inserting at least two types of oncogene into the cells. "A single oncogene produced some changes,
A. was caused by normal cells
B. sometimes resulted from internal actions of the victim’s own body
C. was a hereditary disease
D. was a form of malignancy
[单项选择]A. Three years ago. B. For three years.
C. Maybe in three years. D. No, only three years.
[单项选择]Since I began to work here three years ago, this factory ______ in size.
A. had doubled
B. has doubled
C. doubled
[填空题]I first met Lisa three years ago. She (work) ______ at a radio shop at the time.
[单项选择]A. Three years ago. B. For three years.
C. Maybe in three years. D. No, only three years.
[单项选择]Passage Three
Ten years ago, when environmental lawyer Kassie Siegel went in search of an animal to save the world, the polar bear wasn’t at all an obvious choice. Siegel and Brendan Cummings of the Center for Biological Diversity in Joshua Tree, Calif. , were looking for a species whose habitat was disappearing due to climate change, which could serve as a symbol of the dangers of global warming. Her first candidate met the scientific criteria—it lived in ice caves in Alaska’s Glacier Bay, which were melting away—but unfortunately it was a spider. You can’t sell a lot of T shirts with pictures of an animal most people would happily step on.
Next, Siegel turned to the Kittlitz’s murrelet, a small Arctic seabird whose nesting sites in glaciers were disappearing. In 2001, she petitioned the Department of the Interior to add it to the Endanger
A. call on people to take actions against global warming
B. make people aware of the danger of environmental damage
C. introduce to people a new concept of environmental protection
D. remind people of the importance of protecting endangered species
[单项选择]Three years ago, Ranchero Corporation purchased a patent for a process used in production, for 3 million. At the end of last year, Ranchero determined the fair value of the patent was greater than its book value. No impairment losses have been recognized on the patent. Assuming Ranchero follows International Financial Reporting Standards, what is the impact on its total asset turnover ratio and return on equity of reporting the value of the patent on the balance sheet at fair value Total asset turnover Return on equity()① Lower Higher ② Higher Lower ③ Lower Lower
A. ①
B. ②
C. ③
[单项选择]

More than three million years ago, our ancestors were already on the march, rising on two legs to search for food, seek greener lands and, above all, to grow in body and brain. Let’s meet some of them:
1. Australopithecus afarensis
They had ape-like faces and their brains were a third the size of modem humans’ brains. They lived 3-3.9 million years ago. Fossils were found in Ethiopia in 1974.
2. Paranthropus boisei
Covered with fur, they had strong arms and gorilla-like faces. They lived 1-2.5 million years ago. Fossils were found in Tanzania in 1959.
3. Homo habilis
Homo habilis, which actually means "handy man", was the first species to make and use primitive stone tools. They lived 1.6-2.2 million years ago. Fossils were found in Tanzania in 1960.
4. Homo erectus
With skeletons very similar to those of modern humans, they were probably the first to use fire. They lived 30,000-1.8 million year
A. Homo Neanderthal.
B. Homo habilis.
C. Paranthropus boisei.
D. Australopithecus afarensis.

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