Enhancing a software product may consume (73) percent of the total life-cycle effort.

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Enhancing a software product may consume (73) percent of the total life-cycle effort.
A.80
B.30
C.50
D.42

本题关键词:僵a,ECF-A,EP21-A,EP6-A,EP18-A,EP7-A,Lp(a),Lp（a）,A-aDO2,抗A;