4、 B 二、阅读理解1、Onewaythatscientistslearnaboutmanisbystudyinganimals,suchasmiceandmonkeys.科学家了解人类的一种方法是研究如老鼠、猴子这样的动物。Thescientistsinthislaboratoryare experimentingonmice.Theyarestudyingtherelationshipbetweendietandhealth.Atthistime,overonehundredexperimentsarebeingdoneinthislaboratory