单项选择题

What are salicylates

A．Leaves and tree bark.
B．The chemical in aspirin.
C．Aspirin tablets.
D．A Greek doctor.
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单项选择题
A good title for this article would be ________.
A．Aspirin: the Most Popular Medicine in the World
B．Why I Take Aspirin
C．The Side Effects of Aspirin
D．How to Take Aspirin
单项选择题
Which of the following is NOT true about the ultrasonic torch
A．It enables the blind to live a more normal life.
B．It is mainly used to scan the area in front of the operator for obstacles.
C．Fast succession of bleeps indicates that the obstacle is near.
D．Its sound can warn other people of the blind man’s approach.
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