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【单选题】
肝病并发DIC时，你认为下列哪一组试验最有诊断价值A.
因子Ⅷ:C降低,vWF:Ag增高,vWF\:(Ag)/因子Ⅷ\:C增高
B.
APTT、PT、TT均延长
C.
AT－Ⅲ、PC.纤溶酶原降低
D.
血小板β－TG，PF4和血清FDP均增高
E.
3P试验（＋），FDP含量增高
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举一反三
【单选题】Which of the following is a disadvantage of using secondary data?
A.
Gathering secondary data is costly.
B.
Collecting secondary data is time consuming.
C.
Few sources exist for secondary data.
D.
It is not accurate enough.
【单选题】Decide whether the following is primary data or secondary data. Results of an election opinion poll published in a newspaper
A.
Primary data
B.
Secondary data
【单选题】Secondary data:
A.
is available both internally and outside the firm.
B.
may not be specific enough to answer the question under consideration.
C.
is often all that is needed to solve a problem.
D.
should be considered before primary data is collected.
E.
all of the above.
【单选题】Secondary data is:
A.
Data that does not provide any information
B.
Data collected for another purpose
C.
Data collected specifically for the purpose of the survey being undertaken
D.
Data collected by post or telephone, not by personal interview
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