What does 'the two other new studies' in Paragraph 4 aim to survey?
A．The campaign to have babies sleep on their backs has been very successful.
B．The campaign to have babies sleep on their backs isn't getting to everyone.
C．How baby-carers are implementing existing guidelines for reducing SIDS deaths.
D．How many percent of parents are not following recommendations of back-to-sleep.

未分类题Customers turned to local egg producers rather than supermarkets because they thoughtA．it's safer to eat free-range eggs.B．small-scale producers are more humane.C．salmonella is only limited to large farms.D．free-range eggs have lower salmonella.

判断题Indians move to Britan in 16th century.()

未分类题What is the American Indians fighting against?A．President Obama's proposal.B．The Bush-era taxes cuts.C．The state's cigarette taxes on them.D．The federal government's oppression.

未分类题According to the passage, the administrations of governorsA．devoted a lot to the Senecas' economics.B．closed the interstate highways for cigarette sales.C．failed to get funds from the reservations.D．did a great job in dealing with the Indian nations.

未分类题What measure did Jill take after she became the executive editor?A．She expanded The New York Times' foreign bureaus.B．She encouraged reporters to compete for the Pulitzer Prize.C．She changed The New York Times' online subscription policy.D．She set stricter requirement on errors in the reports.

未分类题The expression 'faint of heart'(Line 1, Para. 4)is closest in meaning toA．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.