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 discovery of dinosaur fossil sites in Bolivia is exciting because of the following reasons EXCEPT ______.
A．they are found in a continent other than Asia and North Continent
B．the largest dinosaurs in the world are found in this discovery
C．there are some unknown species of dinosaurs found this time
D．the dinosaurs were believed to be some of the last ones on earth
单项选择题
The passage focuses on ______.
A．dinosaur’s geographical location
B．shifting views of dinosaurs
C．migration patterns of dinosaurs
D．geologic activity of Earth
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