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【判断题】
熔焊时局部在不承受外加压力的情况下被加热熔化A.
正确
B.
错误
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反馈参考答案：
举一反三
【多选题】在差分放大电路中,输入到两个三极管的基极电压分别为 3.02V 和 3.10V, 以下值不属于差模信号的是 。
A.
3.02V
B.
3.10V
C.
-0.08V
D.
6.12V
【单选题】In the short run, a permanent increase in the domestic money supply causes
A.
a greater upward shift in the DD curve than that caused by an equal, but transitory, increase.
B.
a greater downward shift in the AA curve than that caused by an equal, but transitory, increase.
C.
an smaller upward shift in the AA curve than that caused by an equal, but transitory, increase.
D.
a smaller downward shift in the AA curve than that caused by an equal, but transitory, increase.
E.
a greater upward shift in the AA curve than that caused by an equal, but transitory, increase.
【单选题】In the short run, a cut in the federal funds rate
A.
raises other interest rates as people increase their saving.
B.
increases potential GDP.
C.
increases aggregate demand.
D.
decreases aggregate demand.
【单选题】In the short run, a rise in the federal funds rate shifts the
A.
AD curve leftward.
B.
SAS curve leftward.
C.
LAS curve leftward.
D.
None of the above because a decrease in the quantity of money does not shift a curve.
【单选题】马克思、恩格斯认为，在共产主义社会，由于社会生产力的巨大发展，“三大差别”归于消失，以下选项中不属于“三大差别”的是（ ）。
A.
资产阶级和无产阶级的差别
B.
工业与农业的差别
C.
城市与乡村的差别
D.
脑力劳动与体力劳动的差别
【单选题】In the short run, a monopolist:
A.
always earns an economic profit.
B.
never earns an economic profit.
C.
never earns an accounting profit.
D.
None of the above are correct.
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