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【单选题】
软件的维护并不只是修正错误。为了满足用户提出的修改现有功能、增加新功能以及一般性的改进要求和建议，需要进行(10)，它是软件维护工作的主要部分；软件测试不可能发现系统中所有潜在的错误，所以这些程序在使用过程中还可能发生错误，诊断和更正这些错误的过程称为(11)；为了改进软件未来的可维护性或可靠性，或者为了给未来的改进提供更好的基础而对软件进行修改，这类活动称为(12)。A.
完善性维护
B.
适应性维护
C.
预防性维护
D.
改正性维护
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】How many people were killed in the fire?
A.
More than 220 people.
B.
About 50 people.
C.
More than 300 people.
【单选题】How many people were injured or killed in the blasts?
A.
Nobody were killed, four injured.
B.
Two were killed, five injured.
C.
Two were killed, seven injured.
D.
Nobody were killed, seven injured.
【单选题】已知线段AB=7 cm．现以点A为圆心，2 cm为半径画OA；再以点B为圆心，3 cm为半径画⊙B，则⊙A和⊙B的位置关系是 [ ]
A.
内含
B.
相交
C.
外切
D.
外离
【单选题】How many people were killed and how many were injured in the earthquake?
A.
33, 100.
B.
55, 500.
C.
66, 1000.
D.
77, 1500.
【简答题】How many people were given tasimelteon in the experiment?
【单选题】How many people were killed in the fire?
A.
More than 220 people.
B.
About 50 people.
C.
More than 300 peopl
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