单项选择题

After an exhausting tour, she fell into a heavy ______ and slept long and late.

A．slumber
B．fatigue
C．nightmare
D．relaxation
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单项选择题
Our ______ sensitivity decreases with age. By age 60, most people have lost 40 percent of their abilities to smell and 50 percent of their taste buds.
A．sensible
B．senseless
C．sensitive
D．sensory
单项选择题
Basically a robot is a machine which moves, manipulates, joins or processes ______ in the same way as human hand or arm.
A．characters
B．components
C．catalogues
D．collections
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