单选题Five numbers{1，2，3，4，5}are going to arranged in a row，if the odd numbers can not be arranged next to each other，问能够构成多少个5位数?

单选题8. Spiders of many species change color to resemble the color of the flowers they sit on. Many animals that prey on such spiders possess color discrimination so acute that they, unlike human beings, can readily see the spiders despite the seeming camouflage. It is unlikely, therefore, that the spiders' color changes confer significant survival benefit on these spiders. Which of the following would it be most useful to determine in order to evaluate the argument? ______

单选题. ①Despite the extravagant colors of the flowers bees visit, until the early 1900s it was commonly thought that bees were entirely color-blind. ②To test this, zoologist Karl von Frisch set out an array of dishes on cards. ③The dish on one card, the only blue card among varying grays, contained sugar water. ④Once bees learned to visit this card and dish combination, he varied its position in the matrix. ⑤Next, he replaced all the cards and dishes with a new set of identical materials, only now leaving the blue card's dish empty. ⑥The bees nonetheless returned to the blue card. ⑦If their vision were monochromatic, they would likely have found at least some of the gray cards indistinguishable from the blue.19. The author of the passage refers to "extravagant colors" primarily to ______

单选题 ①As it was published in 1935, Mules and Men

单选题When 10 percent of 5,000 is subtracted from eight percent of 2,000, the difference is

单选题36. The appearance of the star Gamma Cephei varies regularly. The existence of a planet circling a star can cause regular variation in its appearance. However, the regular variation in Gamma Cephei's appearance is no reason to think that there is a planet circling it, since the slow rotation of a star can also cause its appearance to vary regularly and ______. Which of the following most logically completes the argument? ______ A many stars that have planets circling them rotate slowly B. Gamma Cephei varies more in appearance than many other stars do C. it is easier to determine the speed at which a star rotates than to determine whether a planet is circling it D. analysis of sunspot activity on Gamma Cephei shows that it rotates slowly E. Gamma Cephei is only one of many stars that vary regularly in appearance

单选题. ①An Irish newspaper editorial encouraging women to participate in the nonimportation movement launched in Ireland in 1779 appears consistent with a perception that the political use of the consumer boycott originated in North America and spread eastwards across the Atlantic to Ireland. ②This is a view that most historians have concurred with. ③For example, T H Breen argued that the consumer boycott was a brilliantly original American invention. ④Breen did acknowledge that a few isolated boycotts may have taken place in other countries. ⑤However, Mary O'Dowd argues that from the late seventeenth century, Irish political discourse advocated the nonconsumption of imported goods and support for home manufactures by women in ways that were strikingly similar to those used later in North America.25. The passage is primarily concerned with ______

单选题. ①Founder mutations are a class of disease-causing genetic mutations, each derived from its own ancestral ''founder" in whom the mutation originated. ②While most disease-causing mutations are found in humans at a rate of one in a few thousand to one in a few million people, founder mutation can occur at much higher rates. ③This apparent anomaly is partially explained by the fact that most founder mutations are recessive: only a person with copies of the affected gene from both parents becomes ill. ④Most people with only one copy of the gene—"carriers"—survive and pass the gene to offspring. ⑤Furthermore, the single copy of a founder mutation often confers a survival advantage on carriers. ⑥For example, the hereditary hemochromatosis mutation protects carriers from iron-deficiency anemia because the mutated gene allows increased efficiency of iron absorption.24. The passage indicates which of the following about founder mutations? ______

单选题. ①The disappearance of Steller's sea cow from the Bering and Copper islands by 1768 has long been blamed on intensive hunting. ②But its disappearance took only 28 years from the time Steller first described the species, a remarkably short time for hunting alone to depopulate the islands, especially given the large populations initially reported. ③However, by 1750, hunters had also targeted nearby sea otter populations. ④Fewer otters would have allowed sea urchin populations on which the otters preyed to expand and the urchins' grazing pressure on kelp forests to increase. ⑤Sea cows were totally dependent on kelp for food, and within a decade of the onset of otter hunting, Steller noted that the islands' sea cows appeared malnourished.43. Which of the following can be inferred from the passage about kelp forests in the Bering and Copper islands between 1750 and 1768? ______

单选题. ①Only since the late 1960s have literary scholars attempted to establish an accurate and systematic literary history of women novelists. ②Many previous histories suffered from "Great Traditionalism," an approach that, by limiting itself to a group of women writers termed "great," ignored the diversity among women novelists. ③These histories excluded the minor novelists, who are the links in the chain that binds literary generations together, and who allow us to see the continuities in women's writing. ④Given the distortions produced by this concentration on "great" writers, as well as the obviously problematic tendency of many literary scholars to apply stereotypes of femininity, it was not surprising that some literary scholars in the early 1960s evaded the important issue of women's sexual identity entirely, focusing instead on the form and style of women's writing. ⑤Such an approach, while insightful and very valuable, did not consider the crucial connections between women's writing and changes in their legal and economic status.27. According to the passage, some literary scholars in the early 1960s tended to do which of the following in their considerations of women novelists' works? ______

单选题 Historian: Plato

单选题 ①Pikas are small

单选题 Homeowners often weatherize their homes, that is

单选题. ①One reason researchers have long believed that Mars never enjoyed an extensive period of warm and wet climate is that much of the surface not covered by wind-borne dust appear to be composed of unweathered material. ②If water flowed for an extended period, researchers reasoned, it should have altered and weathered the volcanic minerals, creating clays or other oxidized, hydrated phases (minerals that incorporate water molecules in their crystal structure). ①It turns out, though, that the scientists were not looking closely enough. ②New high-resolution mapping data and close-up surface studies have revealed clays and other hydrated minerals in many regions. ③The clay deposits are scattered all over, in ancient volcanic surfaces and heavily cratered highland regions, some of which have apparently been exposed by erosion only recently.37. According to the passage, scientists are able to discover weathered material on the Martian surface because they have benefited from which of the following? ______

单选题If x is an integer, then the least possible value of | 128-5x | is

单选题x=1000yQuantity A: the sum of digits of xQuantity B: the sum of digits of y

单选题100个人中，88个有电视，76个有报纸，有电视没报纸的是x个，问有报纸没电视的有多少?

单选题There are 24 positive integers in a sequence, the first 12 integers are less than 50 and the second 12 integers are greater than 50.Quantity A: the median of the sequenceQuantity B: 50

单选题a+b2=a2+b2, and a=1Quantity A: aQuantity B: b

单选题. ①Data of modern and historic peasant communities suggest that individuals and communities specialize in ceramic production for trade primarily to offset subsistence shortfalls arising from inadequate or insufficient agricultural land. ②Harry investigated whether this correlation of ceramic specialization with agricultural marginality occurred among prehistoric inhabitants of the American Southwest. ③At Arizona's West Branch site, occupied A. D. 900-1100, abundant pottery manufacturing materials suggest village-wide ceramic production in excess of that needed for household purposes.3. The final sentence of the passage primarily serves to do which of following? ______