单项选择题

Electrical appliance such as toasters or hair dryers are designed to ______ the ability of an electric current to heat a wire.

A．take the risk of
B．take advantage of
C．take responsibility
D．make sense of
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单项选择题
Television is another major instrument of communication ______ us to see as well as to hear the performer.
A．permitted
B．permit
C．permitting
D．being permitted
单项选择题
Probability is the mathematical study of the ______ of an event's occurrence.
A．predictability
B．possibility
C．feasibility
D．undeniability
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