单项选择题

France's______ of nuclear testing in the South Pacific last month triggered political debates and mass demonstrations.

A．assumption
B．consumption
C．presumption
D．resumption
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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
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
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