单项选择题

If a substance is dissolved in water or heated, it may ______ a gas.

A．give into
B．give off
C．give over
D．give away
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单项选择题
A．relianceB．reliabilityC．reliefD．relevancy
A．reliance
B．reliability
C．relief
D．relevancy
单项选择题
A．justifyB．justifiedC．justifyingD．having justified
A．justify
B．justified
C．justifying
D．having justified
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