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【单选题】
The significance of the DNA fingerprinting is that ______.A.
the patterns of genetic material are unique in everybody
B.
it can be used to identify criminals by testing their DNAs
C.
DNA testing can tell the wanted information of some people
D.
DNA testing can help those who are wrongly accused
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【简答题】胸片上正常成人的心胸比值不应大于____，右下肺动脉干宽度不大于____。
【简答题】IPSec安全协议主要有两种工作模式，分别为____和____。
【单选题】output at the going price and wants tomaximize profits, it should:
A.
produce at its zero-profit point.
B.
produce where average costequals price.
C.
produce where marginal costequals price.
D.
sell as much as it can produce.