Some hard plastics______(可以取代金属) in manufacturing machine parts.

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问题 Some hard plastics______(可以取代金属) in manufacturing machine parts.

选项

答案Can be substituted for metals/can replace metals/can be used instead of metals

解析 本题主要考查的是be substituted for,意思为“代替”,相当于replace。在使用中注意:A be substituted for B相当于B be replaced by A。
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