單項(xiàng)選擇題

The products described above have been subjected to （?。?treatment of at least 80ºC for 30 minutes.

A. freeze
B. cold
C. heat
D. wash

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單項(xiàng)選擇題

The above mentioned condition was caused （?。﹖he process of manufacturing.

A、in
B、of
C、to
D、for

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