什么是分配率？
参考答案：
分配率是针对某密度（或者粒度）的矿粒而言，在经历分选或分级过程中，进入某种产物中的概率。
（2014届江西省重点中学盟校高三第二次联考英语试卷）30. －Lydia, what did our head-teacher say just now?
－Every boy and every girl as well as the teachers who _____ to lead the group _____ asked to be at the school gate before 6:30 in the morning.
A．is; is
B．are; are
C．are; is
D．is; are
胰腺钩突部肿瘤可引起（）
A.下腔静脉前移
B.肠系膜上静脉前移
C.腹主动脉前移
D.左肾静脉前移
E.肠系膜下动脉前移
