also argue that mercial geic testing is only as good as the reference collections to which a sle is

pared.Databases

used by some panies don’t rely on data collected systematically but rather lump together information from different research projects.This

means that a DNA database may differ depending on the pany that processes the results.In

addition, the puter programs a pany uses to estimate relationships may be patented and not subject to peer review or outside evaluation.

26.In paragraphs

1 and

2 , the text shows PTK’s ___________.[A]easy

availability [B]flexibility in pricing [C] successful promotion [D] popularity with households

27.PTK

is used to __________.[A]locate

one’s birth place [B]promote geic research [C] identify parent-child kinship [D] choose children for adoption

28.Skeptical

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