单项选择题

Mathematics is the instrument used by the physical sciences to __________ phenomena and record conclusion.

A．expel
B．expire
C．exploit
D．explore
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单项选择题
According to the American Red Cross, blood donors are __________ needed after natural disasters or other catastrophes.
A．bizarrely
B．urgently
C．fantastically
D．verbally
单项选择题
The scientist corresponds with colleagues in order to learn about matters__________ to her own research.
A．reluctant
B．residential
C．resultant
D．relevant
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