单项选择题

The prlducts were processed,paceed stowed and transported （） the food hygicnic requirements.

A．under
B．in
C．on
D．by

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单项选择题
The goods were pucked （） plywood cases with gunnies covering the outside

A．about
B．on
C．in
D．up
单项选择题
The representative samples were （）at random

A．being drawn
B．drawing
C．drawn
D．draw
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