TeachersatAmericancollegesanduniversitieshavemanydiffer...
问题详情：TeachersatAmericancollegesanduniversitieshavemanydifferentteachingmethods.Someteachersgivehomeworkandcheckhomeworkeveryday,andstudentsintheirclasseshavetotakemanyexams.Someteachersgiveonlywrit...