单项选择题

我国劳动争议仲裁的机构是（ ）。

A.劳动争议仲裁委员会
B.法院
C.检查院
D.公安机关
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‘Hidden’ Species May Be Surprisingly CommonCryptic species—animals that appear identical but are genetically quite distant—may be much more widespread than previously thought． The findings could have major implications in areas ranging from biodiversity estimates and wildlife management，to our understanding of infectious diseases and evolution．Reports of cryptic species have increased dramatically over the past two decades with the advent of relatively inexpensive DNA sequencing technology．Markus Pfenninger and Klaus Schwenk，of the Goethe—Universitat in Frailkfurt，Germany，analyzed all known data on cryptic animal species and discovered that they are found in equal pmponions throughout all major branches 0f the animal kingdom and occur in equal numbers in all biogeographical regions．Scientists had previously speculated that cryptic species were predominantly found in insects and reptiles．and were more likely to occur in tropical rather than temperate regions．“Species that are seemingly widespread and abundant could in reality be many different cryptic species that have low populations and are highly endangered，”says Pfenninger．Until the genetic information of all species in at least one taxon is thoroughly studied，no one will know just how many cryptic species exist．“It could be as high as 30％．”Pfenninger says．“I’m extremely surprised by their results，”says Alex Smith of the University of Guelph in Ontario．CanadA.“It’s a call to arms to keep doing the broad kind of genetic studies that we are doing．'Sampling as many individuals as possiblE.scientists hope to complete work on aU fish and birds in another 5 to 10 years． Once either of these taxonomic groups is completed，Pfenninger says researchers will able t0 decide how many cryptic species exist throughout the animal kingdom．Examples of cryptic species include the African elephant．A 2001 study found the elephants were actually two genetically distinct，non—interbreeding species，the African bush elephant and the African elephant．The species are currently listed as vulnerable and threatened，respectively，by the World Conservation Union（WCU）．The reclassifications are more than an academic exercisE.They define populations that have evolved independently of each other and whose genetic differences can have significant consequences．In the early 1900s misidentification of mosquito species based on morphology confused attempts to control malaria in EuropE.Ultimately，what was thought to be a single species was actually made up of six sibling species，only three of which transmitted the diseasE.“The basic unit in biology is always the species．and you have to know what you are dealing with，”Pfenninger says．Much previous research is now no longer useD.he says，because it is not clear what species was being studieD.第 36 题 Which of the following about the significance of the research on cryptic species is NOT true?A.The results of the research can help the development of many other research areas．B.The results of the research can help the development of biodiversity estimates．C.The results of the research can help our understanding of infectious disease evolution．D.The results of the research can help our understanding of“survival of the fittest．”
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Father’s involvement in bringing up childrenFew people doubt the fundamental importance of mothers in child—rearing，but what do fathers do?Much of what they contribute is simply the result of being a second adult in the homE.Bringing up children is demanding，stressflul and exhausting．Two adults can support and make up for each other’s deficiencies and build on each other’s strengths．Fathers also bring an array of unique qualities．Some are familiar：protector and role model．Teenage boys without fathers are notoriously prone to troublE.The pathway to adulthood for daughters is somewhat easier，but they must still learn form. their fathers，in ways they cannot from their mothers，how to relate to men．They learn from their fathers about heterosexual trust．intimacy and differencE.They learn to appteciate their own femininity from the one male who is most special in their lives．Most important，through loving and being loved by their fathers，they learn that they are love—worthy．Current research gives much deeper—and more surprising—insight into the father’s role in child—rearing．One significantly overlooked dimension of fathering is play．From their children's birth through adolescence，fathers tend to emphasize play more than care taking．The father's stylE.of playis likely to be both physically stimnlating and exciting．With older children it involves more teamwork，requiring competitive testing of physical and mental skills． It frequently resembles a teaching relationship：come on，let me show yon how． Mothers play more at the child’s level． They seem to willing to let the child direct play．Kids，at least in the early years，seem to prefer to play with daddy．In one study of 212-year-olds who were given a choice，more than two—thirds chose to play with their father．The way fathers play has effects on everything from the management of emotions to intelligence and academic achievement．It is particularly important in promoting self—control． According to one expert，“children who youghhouse with their fathers quickly learn that biting，kicking and other forms of physical violence are not acceptablE.”At play and in other realms，fathers tend to stress competition，challenge，initiative，risk—taking confidencE.Mothers，as caretakers，stress emotional security and personal safety．On the plalyground fathers often try to get the child to swing even higher，while mothers are cautious，worrying about an accident．We know，too，that fathers’involvement seems to be linked to improved verhal and problem-solving skills and higher academic achievement．Several studies found that along with parental strictness，the amount of time fathers spent reading with them was a strong predicator of their daughters’verbal ability．For sons the results have been equally striking．Studies uncovered a strong relationship between fathers’involvement and the mathematical abilities of their sons．Other studies found a relationship between parental nurturing and boys’verbal intelligencE.第 31 题 The first paragraph points out that one of the advantages of a family with both parents is________．A.husband and wife can share houseworkB.two adults are always better than oneC.the fundamental importance of mothers can be fully recognizedD.husband and wife can compensate for each other’s shortcomings
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