( )设函数f(χ)=χeχ则f⑹(0)=(本题1.5分)A、 6B、 0C、 eD、 -e

( )设函数f(χ)=χeχ则f⑹(0)=(本题1.5分)A、 6B、 0C、 eD、 -e

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单选(2分)Most people usually traveled by ship and tra

单选(2分)Most people usually traveled by ship and train which are driven by steam e

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