Finding and managing the desired（　　）mix across the supply chain&-考呗网

单选题Finding and managing the desired（　　）mix across the supply chain is a primary responsibility of logistics．

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1Successful e—businesses are those that recognize the needs of their target audiences and match those needs with relevant（　　）．

2Money may cease to exist，replaced by more convenient technologies such as smart cards and（　　）．

3Because of the complications of air freight，a large proportion of air freight shipments are handled by（　　）．