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  3. In theory, the Habbendorf rotary engine could be a great racing engine, but in practice, it is not. The reason is that the avail

In theory, the Habbendorf rotary engine could be a great racing engine, but in practice, it is not. The reason is that the avail

admin2011-01-20  109
问题 In theory, the Habbendorf rotary engine could be a great racing engine, but in practice, it is not. The reason is that the available fuels do not have sufficient octane to obtain maximum performance from the engine.    The answer to which of the following questions would be most relevant to evaluating the adequacy of the explanation given above for why the Habbendorf rotary engine is not a great racing engine?
选项 A、If the Habbendorf rotary engine were to operate at maximum performance levels, how would its performance compare to that of an engine recognized as a great racing engine?
B、At what level of octane in its fuel does the Habbendorf rotary engine achieve maximum performance?
C、What levels of speed, acceleration, and efficiency must an engine display in order to be considered a "great racing engine?"
D、Could a Habbendorf rotary engine be modified so that it is able to achieve maximum performance with the fuels currently available?
E、If a car equipped with a Habbendoff rotary engine were to race against a comparable car equipped with a great racing engine, by how much would the performance of the great racing engine surpass that of the Habbendorf rotary engine?
答案A
解析 The explanation given in the passage relies on the assumption that if the rotary engine could obtain maximum performance, then it would be a great racing engine. Answer A directly questions that assumption. The question in E is incorrect because it focuses on whether or not the rotary engine is a great racing engine, rather than on the explanation given in the passage. The question in D goes outside the scope of the explanation given in the passage, and B and C do not directly address the given explanation.
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