【单选题】There are about ________ students in our school. [ ]
【单选题】一竹梯有11条横档,相邻两档间的距离都相等,已知最上一档长 40cm ,最下一档是 50cm ,则从上到下第 7 条横档为( )
【单选题】you are so eager to join the school basketball team, why not try out for it?
【单选题】—How many students are there in your school? —_______ students, I think.
【单选题】一竹梯有11条横档,相邻两档间的距离相等,已知最上一挡长40cm,最下一档是50cm,则从下到上第7横档长为