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【单选题】
与一样不在乎物质条件的好坏,仍然快乐自在的是( )。
A.
子路
B.
子夏
C.
D.
子贡
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A.
正确
B.
错误
【单选题】某软件公司开发了一组加密类,在使用这些加密类时欲采用简单工厂模式进行设计,为了减少类的个数,将工厂类和抽象加密类合并,基本UML类图如图所示。以下陈述错误的是( )。
A.
在类图中,Cipher类既充当抽象产品类,又充当工厂类
B.
工厂方法 createCipher()的返回类型为Cipher
C.
工厂方法 createCipher()应定义为静态方法
D.
Cipher类中的 encrypt()方法必须为抽象
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A.
时间范围
B.
空间范围
C.
时空范围
D.
其他范围
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A.
正确
B.
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【单选题】他励直流电动机在所带负载不变的情况下稳定运行,若此时增大电枢电路的电阻,待重新稳定运行时,电枢电流和转矩将()。
A.
增大
B.
减小
C.
不变
D.
电枢电流改变、转矩不变
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