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【多选题】
下列各项表述中，正确的有( )。A.
齿轮传动是用齿轮的轮齿相互啮合传递轴间的动力和运动的机械传动
B.
链传动和带传动相比，链传动有准确的平均传动比
C.
螺旋传动，通常是将回转运动变换成直线运动
D.
带传动是通过传动带对从动轮的拉动来传递运动的
E.
在蜗轮蜗杆传动中，蜗杆是从动件，蜗轮是主动件
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举一反三
【单选题】The sympathetic nervous system
A.
Is widespread in its distribution
B.
Has postganglionic neurons which may have their nerve cell bodies in the sympathetic trunk
C.
Supplies gray rami communicans to anterior primary rami of all spinal nerves
D.
Irinervation abdominal viscera by branches that course through the thorax
E.
All of the above
【简答题】The author says it is ______ that teachers be sympathetic with their students.
【简答题】A．amorous B．desirous C．passionate D．sympathetic
【单选题】The sympathetic nervous system
A.
Has postganglionic neurons which may have their nerve cell bodies in the sympathetic trunk
B.
Supplies white rami communicans to anterior primary rami of all spinal nerves
C.
Innervation all abdominal viscera by preganglionic nerves that arise within the abdomen
D.
Is also called the craniosacral division of the autonomic nervous system
E.
None of the above
【简答题】以下元件封装类型中哪一种是晶振的封装?( )A. RB.2/.4 B. BCY-W2/D3.1 C. AXIAL0.4 D. XTAL1
【简答题】I’m here if you need a ________ ear. (sympathetic)A. sympathetic
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