There are many machines______one form of movement into another.A、to convertB、to

游客2024-01-02 10

问题 There are many machines______one form of movement into another.

选项 A、to convert
B、to be converted
C、the conversion of
D、are converting

答案 A

解析 The infinitive phrase beginning with to convert is an adjective that modifies machines.

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