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【单选题】
关于纯电感交流电路，下列说法正确的是A.
电流在相位上超前电压90°
B.
电压在相位上超前电流90°
C.
电流在相位上超前电压180°
D.
电压在相位上超前电流180°
E.
电压在相位上与电流同相
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举一反三
【判断题】Discourse analysis is more concerned with conventional implicatures than conversational ones.()
A.
正确
B.
错误
【单选题】What function does the interactional meta-discourse serve in composing an essay?
A.
To better understand the discourse.
B.
To engage the reader.
C.
To evaluate the content of discourse.
D.
All of the above.
【单选题】Crude oil has to be ___ before it can be used by vehicles.
A.
refined
B.
clarified
C.
perfected
D.
prepared
【简答题】请简述闭区间上的连续函数的性质。
【单选题】An economist at the University of Alaska at Anchorage has been asked to explain why the price of Alaskan crude oil has fallen recently. In order to assemble a scholarly answer, the professor should ta...
A.
Develop a hypothesis, test the proposition by engaging in empirical analysis, and examine the data to see if it fits with the facts.
B.
Gather data on crude oil prices and seemingly unrelated variables in order to look for associations, then formulate a hypothesis based on those unexpected associations.
C.
Ask people in Alaska why they are not purchasing oil.
D.
None of the above. The oil industry is controlled by a cartel; therefore price changes in the industry cannot be explained using economic theories.
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