新GRE逻辑阅读10套：第七套_GRE阅读

新GRE逻辑阅读10套：第七套

　　Ganandian foods typically are much more acidic than foods anywhere else in the world.

　　The only source of lead poisoning in Ganandia is lead that has leached into food.

　　Most people who use the dinnerware are not aware that it contains lead.

　　Acidic foods can leach lead from dinnerware even if that dinnerware has a protective coating.

　　5. Sergeant Our police academy no longer requires its applicants to pass a physical examination before being admitted to the academy. As a result, several candidates with weak hearts and high blood pressure have been admitted. Hence, we can expect our future police force to have more health problems than our current police force. Knowledge of each of the following would be relevant to determining the reliability of the sergeant s prediction EXCEPT whether

　　police officer candidates are screened for high blood pressure before joining the police force

　　the police officer candidates who are not healthy now are likely to be unhealthy as police officers

　　graduates of the police academy are required to pass a physical examination

　　the health of the current police officer candidates is worse than was the health of police officer candidates in the past

　　a police officer s health is a reliable indicator of the officer s performance

　　6. Because adult iguanas on Plazos Island are much smaller than adult iguanas of the same species on nearby islands, researchers assumed that environmental conditions on Plazos favor the survival of relatively smaller baby iguanas in each yearly brood. They discovered instead that for each of the past three years, 10 percent of the smaller and 40 percent of the larger hatchlings survived, because larger hatchlings successfully evade their predators. Which of the following, if true about Plazos but not about nearby islands, contributes most to an explanation of the long-standing tendency of iguanas on Plazos to be smaller than those of the same age on nearby islands?