49、Chun-Yu Wong of the University of Hong Kong.Dr. Michael Brown, a gastroenterologist at Rush University Medical Center in Chicago, said routine H. pylori screening would not be cost-effective in the United States because the rates of infection and cancer are so low.46. According to the passage, exper 。

50、ts in the Chinese study mentioned in the passage are still not sure _______.A. whether Helicobacter pylori bacteria can cause stomach cancerB. whether stomach cancer is more prevalent in Asia C. whether to treat all carriers of Helicobacter pylori bacteriaD. whether Helicobacter pylori bacteria can。

51、cause stomach ulcer47. Among people who developed cancer in the study, proportion of patients in the treatment group to patients in the placebo group is_____.A. 64%B. 50%C. 90%D. 39%48. In the study, what medicine did the placebo group take during the two-week treatment?A. Antibiotics.B. A dummy med 。

52、icine. C. An anti-cancer medicine.D. Medicine for the precancerous.49. How many patients in the study already had precancerous lesions at the outset of the study?A. 1467B. 988C. 815D. 64250. The findings of the study propose that ______.A. H. pylori patients in high-incidence areas should be screene 。

53、d and treated.B. patients with precancerous lesions are not as easily cured as those without.C. treatment should be given to H. pylori patients without precancerous lesions.D. treatment should not be given to H. pylori patients with precancerous lesions.Passage 4NASAs Goddard Space Flight Center in。

54、Greenbelt, Maryland has been given the nod to lead a robotic lunar mission in 2008- a key step in President George W. Bushs recently announced space vision strategy. The lunar reconnaissance orbiter would likely be geared to investigate the potential for water ice trapped at the Moons poles. This ty 。

55、pe of investigation may involve powerful radar to scan the always darkened craters, thought by some scientists to contain bountiful quantities of water ice.Water ice is believed to have been brought to the Moon by impacting comets. Both NASAs Lunar Prospector and the Pentagons Clementine spacecraft。

56、offered tantalizing data interpreted by some experts as indicative of water ice deposits.A number of alterative, fast-track approaches are under review at the Goddard Space Flight Center (GSFC) to build the lunar orbiter. A newly formed GSFC lunar study team held their first meeting Thursday to begi 。

57、n scoping out how best to move the project forward.President Bush has directed NASA to undertake lunar exploration activities to enable sustained human and robotic exploration of Mars and more distant destinations in the solar system. Starting no later than 2008, the Bush plan calls for initiating a 。

58、 series of robotic missions to the Moon to prepare for and support future human exploration activities. A follow-on robotic lunar lander is also slated for 2009. The White House space directive states that the first extended human expedition to the lunar surface could occur as early as 2015, but no。

59、later than the year 2020.In reestablishing and reenergizing NASAs Moon program, the White House envisions lunar exploration activities to further science, and to develop and test new approaches, technologies, and systems, including use of lunar and other space resources, to support sustained human s 。

60、pace exploration to Mars and other destinations.51. On the robotic lunar mission which is to be led by NASAs Goddard Space Flight Center, the lunar orbiter _______.A. would possibly investigate whether there is water ice at the Moons pole.B. would announce the presidents space vision strategy to the 。

61、 whole world.C. would likely extend human expedition to the lunar surface for the first time.D. would offer tantalizing data interpreted by some experts as space resources.52. On the robotic lunar mission, _____ will be explored to search for water ice.A. impacting comets near the MoonB. the darkene 。

62、d craters on the Moon.C. a robotic lunar lander on the MoonD. NASAs Moon program53. According to the third paragraph of the passage, why a newly formed GSFC lunar study team held their first meeting on Thursday?A. To build the lunar orbiter as soon as possible.B. To move the NASAs Moon programs forw 。

【东华|东华大学2018考博英语】63、ard.C. To search for the best approach to build the lunar orbiter.D. To discuss the scope the lunar orbiter is to explore.54. Federal government of the U.S. states in its space directive that _______.A. the first human landing on the lunar surface would occur no later than 2020B. the first long-time human expedition to the lunar surface would occur in 2015C. the first human extended expedition to the moon would occur before 2021D. the first human survival on the lunar surface would occur no later than 202055. One of the purposes of NASAs Series lunar exploration missions is to _____.A 。

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标题：东华|东华大学2018考博英语( 四 )