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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热门试题

单项选择题

Food deteriorates during storage because ______.

A．necessary chemical preservatives are totally absent from it
B．it is infected with yeasts, moulds and bacteria
C．heat sterilization destroys infections present in it
D．it isn't fit for storage

单项选择题

This passage mainly deals with ______.

A．food storage
B．advantages of canned food
C．the art of canning
D．canning food