A.if our bodies break water down into its parts.
B.if it is possible to collect hair samples across the country.
C.if tap water contains unique proportions of isotopes of hydrogen and oxygen.
D.if the composition of hair can indicate exactly where people are from.
A.Tap water reflects the concentrations of hydrogen and oxygen isotopes in different regions.
B.Tap water is a kind of soft drink in the United States.
C.Tap water contains unique proportions of isotopes of hydrogen and oxygen.
D.Tap water is used to cook food.
开始考试点击查看答案A.Americans do not like to make generalizations about themselves on the basis of regional differences.
B.Americans have fixed ideas about different people coming from different regions and areas within their own country.
C.Americans think that they are equal to one another no matter where they were born.
D.Americans are trying hard to iron out their regional differences
开始考试点击查看答案A.different Americans have different sources of origin.
B.not all Americans were born and raised in the U. S.
C.American culture has not been thoroughly studie
D.D.they, as individuals, do not have the same ideas and ways of doing things.
开始考试点击查看答案A.are based on their personal choices.
B.are forced on them by the society in which they were born.
C.can also be found in other cultures.
D.should be recognized the world over.
开始考试点击查看答案A.does not really exist.
B.is better than other cultures.
C.is different from other cultures.
D.is highly valued around the world.
开始考试点击查看答案A.Ehleringer was successful in his research.
B.Ehleringer failed in his research.
C.Ehleringer can be a successful detective.
D.Ehleringer's research proved successful in China.
开始考试点击查看答案A.The new technique can tell precisely where a person lives.
B.Water supplied in different regions all come from the same source.
C.Types of water used in different regions provide useful information for the police.
D.Hair samples provide the most important clues to identify crimes.
开始考试点击查看答案A.Human hair may help detectives to solve crimes.
B.Animal hair may help detectives to solve crimes.
C.Detectives watch hairy criminals closely.
D.Most detectives are hair specialists.
开始考试点击查看答案A.They have started to produce electric cars.
B.They have done extensive research on electric cars.
C.They have given up producing electric cars.
D.They have produced thousands of electric cars.
开始考试点击查看答案A.Will be the main transportation vehicles in the future.
B.Will not be the main transportation vehicles in the future.
C.Will be good to the environment in the future.
D.Will replace petrol-powered vehicles in the futur
开始考试点击查看答案注册安全工程师注册安全工程师安全生产技术2013年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2013年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2013年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2013年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2013年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2012年注册安全工
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