题干
Some students in this school abroad as exchange students every year.
A：sent
B：send
C：are sent
答案(点此获取答案解析）
C
Some students in this school abroad as exchange students every year.
A：sent
B：send
C：are sent
名工人某天生产同一零件，生产的件数是
设其平均数为
,中位数为
,众数为
，则有( )