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單項(xiàng)選擇題

We give you on the attached sheet full details regarding packing and markin9，which must be strictly__________．

A. observed
B. abide by
C. submitted
D. seen

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

A. freeze
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C. heat
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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