单项选择题


A．adults
B．parents
C．elders
D．teachers
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单项选择题
Food canning technology makes it possible to______.
A．increase the amount of food products.
B．make food more delicious
C．eat previously seasonal food at any time
D．grow strange plants
单项选择题
All of the following are the steps of canning food except ______.
A．cleaning and trimming raw food
B．sterilizing canned food
C．blanching vegetables that are to be calmed
D．printing labels and packing the tins into boxes
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