【单选题】
下面有3篇短文，每篇短文后有5道题。请根据短文回答其后面的问题，为每题确定一个最佳答案。
{{B}}第一篇{{/B}}
U.S. to Start $ 3.2BillionChild Health Study in January
A、study that will cost $ 3.2 billion and last more than two decades to track the health of 100,000 U. S. children from before birth to age 21 will be launched in January, U. S. health officials said on Friday.
Officials from the U. S. government’s National Institutes of Health said they hope the study, to be conducted at 105 locations throughout the United States, can help identify early-life influences that affect later development, with the goal of learning new ways to treat or prevent illness.
The study will examine hereditary(遗传的) and environmental factors such as exposure to certain chemicals that affect health.
Researchers will collect genetic and biological samples from people in the study as well as samples from the homes of the women and their babies including air, water, dust and materials used to construct their residences, the NIH saiD、
Officials said more than $ 200 million has been spent already and the study is projected .to cost $ 3.2 billion.
"We anticipate that in the long term(从长远说来), what we learn from the study will result in a significant savings in the nation’s health care costs. "Dr.DuaneAlexander, who heads the NIH’sEunice Kennedy Shriver National Institute ofChild Health and HumanDevelopment, told reporters.
The study will begin in January when the University of NorthCarolina and the Mount Sinai School of Medicine in New York start signing up(使报名从事) pregnant women whose babies will then be followed to age 21.
Some of the early findings will be about factors behind pre-term birth (早产), which has become more common in recent years, according toDr. Peter Scheidt of the NIH, who heads the study.
The people taking part will be from rural, urban and suburban areas, from all income and educational levels and from all racial groups, the NIH saiD、
B．biological samples from people in the study
C．samples from the homes of the women and their babies
D．samples of air and water from hospitals
网考网参考答案：D
网考网解析：
[解析] ABC三项在短文的第四段都有提及。D项samples of air and water from hospitals.(医院中的空气与水)不正确，应该是samples from the homes of the women and their babies including air，water，dust and materials used to construct their residences(参加研究的妇女及其婴儿家中的空气与水等物质)。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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