OG19新题 题目总数：142 做题总人数：14153 平均准确率：78.2%
Is x+1y+1 >xy ?(1)x>1 (2)x
来源： 140人已做 600难度 48.6%正确率
来源： 2894人已做 600难度 92.2%正确率
Last year a record number of new manufacturing jobs were created. Will this year bring another record? Well, any new manufacturing job is created either within an existing company or by the start-up of a new company. Within existing firms, new jobs have been created this year at well below last years record pace. At the same time, there is considerable evidence that the number of new companies starting up will be no higher this year than it was last year and there is no reason to think that the new companies starting up this year will create more jobs per company than did last year's start-ups. So clearly, the number of new jobs created this year will fall short of last years record.
来源： 107人已做 600难度 57%正确率
来源： 1346人已做 680难度 71.3%正确率
来源： 1412人已做 680难度 88.1%正确率
来源： 1610人已做 700难度 74.9%正确率
来源： 971人已做 700难度 84.7%正确率
If n is a positive integer and k=5.1× , what is the value of k ?(1) 6,000 < k
来源： 1602人已做 700难度 78.3%正确率
来源： 1604人已做 680难度 69%正确率
来源： 4335人已做 600难度 85.8%正确率
In the past year Harborville has had an unusually high rate of new cases of a certain disease. An investigation revealed that over the past five years Harborville's public water supply has had a high level of pollutants. Medical researchers have hypothesized that Harborville's water is responsible for the high rate of new cases of the disease.Each of the following, if true, provides additional support for the researchers' hypothesis EXCEPT:
In a certain wildlife park, park rangers are able to track the movements of many rhinoceroses because those animals wear radio collars. When, as often happens, a collar slips off, it is put back on. Putting a collar on a rhinoceros involves immobilizing the animal by shooting it with a tranquilizer dart. Female rhinoceroses that have been frequently recollared have significantly lower fertility rates than uncollared females. Probably, therefore, some substance in the tranquilizer inhibits fertility.Which of the following is an assumption on which the argument depends?
In preparation for a large-scale tree-planting project, Thomasville has recorded the location, species, and condition of every tree in its downtown area. The results will be compared with results of the last such tree census, taken 20 years ago. Planting trees primarily from the species that turns out to have the best record of survival will assure downtown Thomasville of an abundant tree population 20 years from now.Which of the following, if true, most seriously undermines the claim that the tree-planting proposal will assure an abundant tree population?
【OG20-P283-350题】Is the sum of the prices of the 3 books that Shana bought less than $48?(1)The price of the most expensive of the 3 books that Shana bought is less than $17.(2)The price of the least expensive of the 3 books that Shana bought is exactly $3 less than the price of the second most expensive book.
In parts of South America, vitamin-A deficiency is a serious health problem, especially among children. In one region, agriculturists hope to improve nutrition by encouraging farmers to plant a new variety of sweet potato called SPK004 that is rich in betacarotene, which the body converts into vitamin A. The plan has good chances of success, since sweet potato is a staple of the region’s diet and agriculture, and the varieties currently grown contain little beta-carotene.Which of the following, if true, most strongly supports the prediction that the plan will succeed?
According to the passage, the magnetic field within the Moon’s core
The passage implies that, in comparing four European countries, Duverger found that the voting rates of women and men were most different in the country in which women
Patricia purchased x meters of fencing. She originally intended to use all of the fencing to enclose a square region, but later decided to use all of the fencing to enclose a rectangular region with length y meters greater than its width. In square meters, what is the positive difference between the area of the square region and the area of the rectangular region?(1)xy=256(2)y=4
The pharmaceutical industry argues that because new drugs will not be developed unless heavy development costs can be recouped in later sales, the current 20 years of protection provided by patents should be extended in the case of newly developed drugs. However, in other industries new-product development continues despite high development costs, a fact that indicates that the extension is unnecessary. Which of the following, if true, most strongly supports the pharmaceutical industry's argument against the challenge made above?
Dolphins lack vocal cords, nevertheless creating sounds: a complicated system of whistles, Squeaks, moans, trills, and clicks are produced by sphincter muscles inside the blowhole.