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【单选题】
下列关于捕获异常的描述中，错误的是______。
A.
在异常处理代码段中无法访问hy代码段中声明的变量
B.
子类异常可被父类异常捕获处理
C.
try-catch机制可以被用于流程控制
D.
在catch代码段中的return语句用于退出方法，而不是返回异常抛出点
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