单项选择题

Solid geometry has enabled astronomers to calculate the positions of the heavenly bodies______ to one another.

A．absolute
B．relative
C．comparative
D．contrastive
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单项选择题
Programmed instruction received its major impetus from the work of behaviorist J. H. Skinner, who after years of research,______ a practical system in 1954.
A．described
B．derived
C．imitated
D．devised
单项选择题
After discussing the matter with the bank manager, Peter ______received his loan.
A．instantly
B．instinctively
C．casually
D．unexpectedly
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