肾阴虚型骨缺血性坏死，中医辨证施治首选方剂（） A.四妙散加减 B.六味地黄丸加减

2011年10月29日，全国人大常委会通过了《关于修改(中华人民共和国居民身份证法)的决定》，根据这一决定，居民身份证登记项目中增加的信息是（）。

A．血型

B．职业

C．学历

D．指纹

建筑业企业资质等级分为( )。

A．总承包

B．专业承包

C．劳务分包

D．二级企业

E．一级企业

小明阅读了下表后，得出了一些结论，其中错误的是

              几种物质的比热容c/[J·(㎏·℃) ^-1]

A．沿海地区昼夜温差比内陆地区小

B．同种物质在不同状态下，其比热容不同

C．质量相等的铜块和铅块，升高相同的温度，铜块吸热多

D．液体的比热容都比固体大

It is a wise father that knows his own child, but today a man can boost his paternal (fatherly) wisdom— or at least confirm that he’s the kid’s dad. All he needs to do is shell out $30 for paternity testing kit (PTK) at his local drugstore—and another $120 to get the results.

More than 60,000 people have purchased the PTKs since they first became available without prescriptions last year, according to Doug Fogg, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests directly to the public, ranging in price from a few hundred dollars to more than $ 2,500.

Among the most popular: paternity and kinship testing, which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption. DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family’s geographic roots.

Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA.

But some observers are skeptical. "There is a kind of false precision being hawked by people claiming they are doing ancestry testing," says Troy Duster, a New York University sociologist. He notes that each individual has many ancestors—numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father’s line or mitochondrial DNA, which is passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.

Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don’t rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may have a lot of data from some regions and not others, so a person’s test results may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.

PTK is used to （）

A. locate one’s birth place

B. promote genetic research

C. identify parent-child kinship

D. choose children for adoption

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