单项选择题

Which of the following symptoms will distinguish the flu from a cold

A．A stuffy nose.
B．A high temperature.
C．A sore throat.
D．A dry cough.
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How much of your country's electrical supply is ______from water power
A．deduced
B．derived
C．detached
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单项选择题
If children have flu-like symptoms, their parents ______
A．are advised not to give them aspirin
B．should watch out for signs of Reye syndrome
C．are encouraged to take them to hospital for vaccination
D．should prevent them from mixing with people running a fever
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