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【单选题】
( )关键字表示它是一种类方法,且无需创建对象即可访问。A.
void
B.
static
C.
return
D.
public
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举一反三
【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】The word 'traffic' (Para. 3) probably means'______'.
A.
all the vehicles moving along a road
B.
the movement of aircraft between one place and another
C.
certain dealings or business
D.
the total volume of messages
【简答题】物流业务中的核心业务是（ ）。
【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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