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C
Scientists have discovered that a virus called S-virus has infected most of the broiler chickens. The infected chicken meat can be harmful to human health. Researchers have developed a harmless bacterium in the lab, which can effectively help the broilers resist S-virus infection when fed to them. Therefore, the researchers predict that if this harmless bacterium is widely used in the process of broiler breeding, the risk of consumers getting sick after eating chicken will be greatly reduced.
P: can effectively help the broilers resist S-virus infection when fed to them
C: that if this harmless bacterium is widely used in the process of broiler breeding, the risk of consumers getting sick after eating chicken will be greatly reduced.
重点是:consumer getting sick?
Which of the following, if true, would most weaken the researchers' prediction above?
(A) Not all chicken meat infected with the S-virus is harmful to human health.无关,前提是使用以后
(B) Even if consumers eat chicken that is not infected with the S-virus, they may still get sick for other reasons.无关选项,题目讨论的事用bacterium减少S病毒敢按
(C) Chicken meat infected with the S-virus may cross-contaminate other uninfected chicken meat during the sales process in supermarkets.保留,提出了感染S病毒的其他可能性
(D) Consumers can effectively eliminate the S-virus and reduce the risk of getting sick by thoroughly cooking the chicken.无关,问题是this harmless bacterium到底有没有用
(E) Not all broiler farms have the ability to use this harmless bacterium during the breeding process.无关
D
A certain type of banana has become the best-selling variety due to its superior taste and texture. When shipping bananas, it is most economical for farmers to transport only one type of banana per shipment. This is because bananas can be ripened together during the shipping process, ensuring they all reach maturity at the same time. If multiple varieties of bananas are shipped together, they will ripen at different rates, causing some bananas to spoil during transit. However, a specific virus has been known to infect this popular banana variety. If a shipment contains only this variety and becomes infected, the entire shipment of bananas will spoil.
Togther的坏处:ripe at different rate, togther的好处:防止一种香蕉因为感染病毒全部坏掉->分散风险
Which of the following best represents the farmer's conclusion?结论题
(A) Shipping multiple varieties of bananas together is more economical than shipping only one variety.没有这方面的信息,我们不知道那个更划算,按理说在没感染病毒的情况下less economical
(B) The virus that infects the popular banana variety is not a significant threat to banana farmers.不知道
(C) The economic benefits of shipping only one variety of banana outweigh the potential losses from a virus infection.不知道
(D) If a virus infects a shipment containing only the popular banana variety, the resulting losses will exceed the economic benefits of shipping only one variety.->方向对
(E) Farmers should discontinue growing the popular banana variety due to the risk of virus infection during shipping.没提
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