To document your code can increase program (57) and make program easier to (58) .
A. reliability
B. security
C. readability
D. usability
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Consumption of the total life-cycle effort in software maintenance is ______ that in software development.
A. less than
B. larger than
C. equal Or less than
D. equal or larger than
Maintenance activities include ______. ①making enhancements to software products ②developing a new software product ③correcting problems ④adapting products to new environments
A. ①②
B. ①③④
C. ②③④
D. ①②③④
根据《联合国销售合同公约》的解释,接受必须用声明或行动表示出来,沉默或不行动本身不等于接受。()
A. 对
B. 错
双扩试验平板法中,若抗体含量较大,则反应沉淀线应
A. 靠近抗原孔
B. 靠近抗体孔
C. 在两孔之间
D. 呈多条沉淀线
E. 不出现沉淀线