For the following questions, select the best of the answer choices given.
　　A taxi driver purchased four tires of the Toughgrip brand for his cab. Within six months of his purchasing these tires, three of them suffered irreparable blowouts. Despite the poor track record of these fires, the driver replaced all three of the damaged tires with new Toughgrip tires.

单选题

Which of the following, if true, does NOT support the driver’s decision to replace the damaged tires with new Toughgrip tires?

A、
Toughgrip tires are the only tires the driver can afrord.
B、
The driver feels obligated to buy tires from his brother, who sells only Toughgrip tires.
C、
One of the tires was slashed by a rival driver, while the other two blew out in traffic because of material defects.
D、
The Toughgrip Company offered to replace all of the tires free of charge because the tires were covered under a 60,000-mile warranty.
E、
The taxi company for whichthe driver works has endorsed Toughgrip as the official tire of the company’s cars.

【正确答案】 C

【答案解析】

A、B、D、E四项为司机的决定提供了解释，C项则相反，故本题应选C项。

单选题

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 whythe Habbendorf rotary engine is not a great racing engine?

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 Habbendorf rotary angine were to race against a comparable car equipped wth a great racing angine, by how much would the performance of the great racing engine surpass that of the Habbendorf rotary engine?

【正确答案】 A

【答案解析】

通过分析可知，装缸发动机能否实现最大功率是衡量发动机的标准，故本题应选A项。

单选题

Our criminal justice system is inherently flawed because it relies on amateur juries of decent citizens, who lack the perspective to understand the criminal mind. To have an effective criminal justice system would require professional juries, who would be able to deal with these criminals in a way that gets results.
The argument above depends on which of the following assumptions?

A、
Professional jurors will be more reliable than amateur jurors because they will not attempt to avoid jury duty.
B、
Professional jurors will not be burdened by the biases against race, gender, and religion that amateur jurors bring into the courtroom.
C、
Dealing with criminals in a way that gets results requires an understanding of the criminal mind.
D、
No amount of professional training can impart the perspective of the criminal mind necessary to run an effective criminal justice system.
E、
Jurors possessing the perspective to understand the criminal mind are unfit to serve on a jury, because they are likely to be criminals.

【正确答案】 C

【答案解析】

根据“professional juries, who would be able to deal with these criminals in a way that gets results”可以推测作出结论的前提是认为需要对犯罪心理的了解才能得出真正的结论，故本题选C项。

单选题

When unscrupulous people shoplift, a vicious cycle results. Retailers must ralse their prices in order to make up for the lost sales, and the higher prices encourage more people to shoplift. This vicious cycle hurts honest consumers worst of all, because they have to pay higher prices.
The vicious cycle described above could not happen unless which of the following is true?

A、
Shoplifters usually steal only items that they need but cannot afrord.
B、
Retailers do not take shoplifting losses into account when they initially set their prices.
C、
The best way for retailers to address shoplifting is by punishing shoplifters to the tidiest extent of the law.
D、
Some people would shoplift no matter how low retailers set their prices.
E、
It costs retailers more to pay security guards to prevent shoplifting than just to absorb the cost of occasional losses due to theft.

【正确答案】 B

【答案解析】

B项说描述的是恶性循环的根源，故本题应选Ｂ项。