RC OG42, Backward integration removes the need for some purchasing and marketing functions, centralizes overhead, and permits manufacturers to eliminate duplicated efforts in research and development. Where components are commodities (ferrous metals or petroleum, for example), backward integration almost certainly boosts profits. Nevertheless, because product innovation means adopting the most technologically advanced and cost-effective ways of making components, backward integration may entail a serious risk for a technologically active company—for example, a producer of sophisticated consumer electronics. 红字表明metal可以是commodity。同时:commodity其中的一个意思:An article of trade or commerce, especially an agricultural or mining product, that can be transported. 用品一种贸易或商业物品。尤指农业或矿产品,能够运输。这个意思也表明metal可以是commodity。所以: The market for recycled commodities like aluminum and other metals remain strong despite economic changes in the recycling industry. A. commodities like aluminum and other metals remain B. commodities like those of aluminum and other metals are remaining C. commodities such as aluminum and other metals remains D. commodities,such as aluminum and other metals, remain E. commodities, like the commodities of aluminum and other metals, remains 这样从OG的阅读里可以证明,commodities such as aluminum and other metals 是对的。证明偶选C没错。 |