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- 单项选择题 现自: 1. interface Color { } 2. interface Weight { } 3. //insert code here 和以下足六个声明: class Boat extends Color, extends Weight { } class Boat extends Color and Weight { } class Boat extends Color, Weight { } class Boat implements Color, implements Weight { } class Boat implements Color and Weight { } class Boat implements Color, Weight { } 分别插入到第3行,有多少行可以编译? ()
A、 0
B、 1
C、 2
D、 3
- B
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