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
The information in paragraph 2 shows that ______.
A．aspirin can be dangerous
B．aspirin is always safe
C．aspirin has been around a long time
D．aspirin should be forbidden to apply to children
单项选择题
Witmer's research leads people to believe ______.
A．Tyrannosaurus Rex had lips and Triceratops had cheeks
B．dinosaurs might have looked like mammals such as sheep
C．dinosaurs might net have looked like what we thought
D．dinosaurs must have looked like birds or crocodiles
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