The expression 'faint of heart'(Line 1, Para. 4)is closest in meaning to
A．female reporters.
B．sensitive personality.
C．frail character.
D．incompetent people.

未分类题According to Matthew Wilson, Frieds study is important becauseA．it's a professional study carried out by UCLA neuroscientist.B．it results from the cooperation of Itzhak Fried and foreign experts.C．it follows the long-held assumption of many experts in this field.D．it proves the long-held assumption of many experts in this field.

未分类题Exploring the storage and retrieval of information in brain is a meaningful matter because itA．helps people to remember what happened in the past more accurately.B．helps doctors to restore memory function to aging or diseased brains.C．proves storage and retrieval of information are concentrated in the same cells.D．provides people the opportunity to see human memory recall in action in real time.

未分类题According to the passage, which of the following statements is true?A．Whether people can recall the details of yesterday's lunch is a trivial matter.B．After years of research, doctors made initial progress in restoring episodic memory.C．What's published in Science this month is carried out by Fried and his colleagues.D．Some experts think the discovery of when neurons work in Fried's study is useless.

单项选择题岩溶水按垂直方向可分为垂直循环带,季节循环带,( ),深部循环带.A.潜水带B.承压水带C.水平循环带D.地表溶蚀带

未分类题The most effective way to regain students mental health is thatA．counselors hold mental-health screening sessions more frequently.B．campuses offer more online services to keep students' privacy.C．outreach programs are created by students themselves.D．neuroscience majors found more associations in psychological aspect.

未分类题According to Paragraph 2, which of the following statements is true?A．Different rates of common cancers in different regions result from different lifestyles.B．The rate of several extremely common cancers in the U. S. is higher by 1 10 or 1 20.C．People who migrate to the United States have high cancer rates after a generation.D．If people out of the western world stay at home, their risk of cancer won't rise.

未分类题What can we learn from the passage?A．The present situation of women's social status is satisfying.B．NAS will address gender-related problems one by one.C．The report posted by IAC doesn't give a clear evaluation of gender problems.D．The only aim of the report was to remove barriers and increase chances for women.

未分类题In the United States, both genomicists and plant scientists want to find outA．the way converting sugars from crops such as corn or sugarcane to ethanol.B．how to process cellulose from the cell walls of stems and leaves.C．how to increase the oil content of oil-producing crops.D．how to make high-energy plants.

未分类题Why switch grass and Miscanthus were taken as energy plant?A．Because they contain more cellulose.B．Because genomes have been sequenced for clues to make other plants better energy crops.C．Because some scientists are breeding a wide variety of candidate crops.D．Because the spotlight is on this underdeveloped field.

未分类题Which of the following best summarizes the main idea of the passage?A．Plant Breeders' dream will come true.B．Converting sugars from crops is a threaten to the food supply.C．The research on the high energy plant is being done.D．Cost-effective biofuels are very popular now.

未分类题Why the individuals, companies as well as governments are desperate for farmland?A．Because people get food mainly from farmland.B．Because 50 million acres farmland vanish each year.C．Because farmland is the potential investment.D．Because people see the farmland as the root of all commodities.

未分类题The word 'backfire'(Line 3, Para. 8)most probably meansA．to come to their senses.B．to produce helpful results.C．to make little progress.D．to get an outcome against the purpose.

未分类题We may infer from the last paragraph thatA．treating burn victims is not a problem now.B．real skin replacement means skin grafts with rejection.C．people at the Army medical center has grown each soldier's graft.D．one way to treat burn victims is to grow a patient's own skin as a graft.

未分类题What was the result of doubling the funding from $42.5 million to $85 million over 5 years?A．There would be much more wounded people who can be cured.B．Another consortium could come in to compete with the planned one.C．Researchers in the consortia's 28 research groups could get more public and private funds to match DOD's input.D．Robert Vandre would change the consortium to a larger one.

单项选择题氨苄青霉素可采用的含量测定方法是:()