问题
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Rudder motion is prevented from exceeding the movement of the steering wheel by the .A.ret
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The rotary motion of a diesel engine crankshaft is obtained from the up and down motion of
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A facial expression results from one or more motions or positions of the muscles of the fa
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The ______ newspaper accounts of the marital problems of the royal couple fascinated many
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Muscular motion is caused by the stimulate of specific nerve cells in the brain and spinal
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The national flag of the United States is called "the Stars and Stripes", with______ stars