单项选择题

Both lauching and crying seem to be （） dictated by a rapid change in our autonomic system.

A.behaviors
B.symptoms
C.actions
D.reactions

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单项选择题
Only one－fifth of the Americans meet the guidelines for both aerobic and resistance （）.

A.exercise
B.exercises
C.exercising
D.to exercise
单项选择题
Under the direstion of the surgeon，the instrumentation can be （）.

A.controlling
B.controls
C.controlled
D.control
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