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1、read -p  "Please input season " seasonif [ "$season" = "spring" ] ; then echo "It is spring"elif [ "$season" = "summer" ] ; thenecho "It is summer"elif [ "$season" = "autumn" ] ; thenecho "It is autumn"elif [ "$season" = "winter" ] ; thenecho "It is winter"elseecho "Input error"fi。

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