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一个微型企业雇佣员工的目的就是让他们去做老板自己不会做的事。()A.
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B.
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举一反三
【单选题】OPEC successfully raised the world price of oil in the 1970s and early 1980s, primarily due to_________.
A.
a reduction in the amount of oil supplied and a world-wide oil embargo
B.
a reduction in the amount of oil supplied and an elastic demand for oil
C.
a world-wide oil embargo and an elastic demand for oil
D.
an inelastic demand for oil and a reduction in the amount of oil supplied
【简答题】In the 1970s, OPEC caused a dramatic increase in the price of oil. What pred it from maintaining this high price through the 1980s?
【单选题】OPEC successfully raised the world price of oil in the 1970s and early 1980s, primarily due to
A.
an inelastic demand for oil and a reduction in the amount of oil supplied.
B.
a reduction in the amount of oil supplied and a world-wide oil embargo.
C.
a world-wide oil embargo and an elastic demand for oil.
D.
a reduction in the amount of oil supplied and an elastic demand for oil.
【单选题】均匀磁场B被限制在半径R=10cm的无限长圆柱空间内，方向垂直纸面向里。取一固定的等腰梯形回路abcda，梯形所在平面的法向与圆柱空间的轴平行，位置如图所示。设磁场以dB/dt=1T/s的匀速率增加，已知θ=π/3,oa=ob=6cm，od=18cm。等腰梯形回路中感生电动势的大小为[ ]。【图片】
A.
3.68mV
B.
5.23mV
C.
1.56mV
D.
14.4mV
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