逆向工程在软件工程中主要用于( )阶段。
A．分析
B．设计
C．编码
D．维护
参考答案：A
1. John always does his homework ______________ in order not to make any mistakes.
2. It’s ______________ to find any excuse when you do something wrong.
3. The factory makes a new type of cars which produces less air ______________.
4. All the victims were saved and taken to ______________.
5. We all know Mother’s Day is on the ______________ Sunday of May.
组间变异
