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【单选题】
病人,男,36岁,搬运工人,站立时阴囊部位出现肿块,呈梨形,平卧时可还纳,体检发现外环扩大,嘱病人咳嗽时,指尖有冲击感,平卧回纳肿块后,手指压迫内环处,站立咳嗽,肿块不再出现。此病人的诊断为A.
腹股沟斜疝
B.
腹股沟直疝
C.
股疝
D.
脐疝
E.
切口疝
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【单选题】If the elasticity of demand for mothballs is 0.50, then moving along the demand for mothballs:
A.
A 20% rise in the price of mothballs will lead to a 10% fall in the quantity of mothballs demanded.
B.
A 10% rise in the price of mothballs will lead to a 20% fall in the quantity of mothballs demanded.
C.
A 20% rise in the price of mothballs will lead to a 10% rise in the quantity of mothballs demanded.
D.
A 10% rise in the price of mothballs will lead to a 20% rise in the quantity of mothballs demanded.
【单选题】Moving along the short-run Phillips curve indicates
A.
that higher inflation leads to a higher unemployment rate.
B.
that higher unemployment leads to a higher inflation rate.
C.
a tradeoff between inflation and unemployment so that higher inflation is related to lower unemployment.
D.
that the natural unemployment rate falls when the inflation rate rises.
【单选题】A __________ is a firm that participates in moving the product along the distribution channel.
A.
financial intermediary
B.
production specialist
C.
sales consultancy
D.
marketing intermediary
【简答题】PN结反偏时,内电场与外电场的方向 ,空间电荷区变 ,有利于 载流子的漂移运动,阻碍 载流子的扩散运动,此时 PN结呈现的电阻 , PN结处于 状态。
【单选题】Something was moving ______ silence along the edge of the woods.
A.
at
B.
in
C.
on
D.
with
【简答题】PN结反偏时,内电场与外电场的方向 ,空间电荷区变 ,有利于 数载流子的漂移运动,阻碍 数 载流子的 的扩散运动,此时 PN结呈现的结电阻阻值 , PN结处于 状态。
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