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多项选择题linux系统中，以下显示结果相同的是（）。

A、echo The current working path is $PWD.

B、echo "The current working path is $PWD." Echo hello

C、echo 'The current working path is $PWD.' Echo hello

D、echo "The current working path is `pwd`."

E、echo The current working path is $PWD. Echo hello

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