单项选择题

The ______ snow on top of a building during the winter sometimes will weaken the construction and occasionally cause the roof to collapse.

A．permeated
B．crumbled
C．mingled
D．accumulated
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单项选择题
In case of poisoning, immediately give large quantities of soapy or salty water in order to ______ vomiting.
A．induce
B．inflict
C．inhibit
D．insulate
单项选择题
The canned and packaged foods are required to list all the ______ on the label.
A．constitutions
B．allowances
C．prescriptions
D．ingredients
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