| 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]He drives much ______ than he did three years ago.
[A]more carefully [B]carefully [C]more careful [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: [单项选择]A. She hasn’t seen her sister for years.
B. She has no time to see her sister. C. She is eager to go back to Colorado for the scene. D. She is so busy that she has no time to climb the mountain. [单项选择]His mother（）for three years.
A. died B. was dead C. has been dead [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 我来回答: 提交
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