piece,grain,drop:attaches,is attached,attachInvented in 1969,RFI

2024-08-22 10:53:11
英语语法(00831)

piece,grain,drop:attaches,is attached,attach
Invented in 1969,RFID chips are about the size of a ______of sand.Each chip has a unique ID number and ______ to the product.
【正确答案】：grain; is attached

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