【单选题】某企业产品组合如图所示: 则每条产品线的平均深度为:
【单选题】某企业产品线的深度为5,企业产品线的深度为6,企业产品线的深度为7.则每条产品线的平均深度为
【简答题】I found that the students _________(play) football on the playground.
【判断题】When I entered the classroom, I found that there had many students there.
【单选题】When I entered the classroom, I found the students ________ the questions in group.
【单选题】When I entered theclassroom,I found the students_________the questions ingroups.