题目内容

The potential hazards of the toxin from Clostridium botulinum is sufficient to create ( )fatality in humans who ingest the toxin.

A. 65%
B. 70%
C. 90%
D. 30%

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Pasteurization is most often associated ( ) .

A. with liquid foods and elevated temperature
B. with solid foods and elevated temperature
C. with elevated temperature
D. with Clostridium botulinum

Low-acid foods have pH values higher than ( ).

A. pH4.6
B. pH3.7
C. pH7.0
D. pH6.0

The principle of ______ that under conditions of low vapor pressure (vacuum),water evaporates from ice without the ice melting.

Vacuum drying produces the highest quality of product but is also very______ .

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