肝脏疾病A．四肢对称性紫癜伴有关节痛及腹痛、血尿B．紫癜伴有黄疸C．自幼有轻伤后出血

如图15-2-21所示，将一根长为L的直导线，由中点折成直角放在磁感应强度为B的匀强磁场中，导线平面与磁感线垂直.当导线中通以电流I后，求磁场对导线的作用力.

图15-2-21

It’s impossible for him ______.

A．talk with his parents about his mistakes

B．talking with his parents about his mistakes

C．talked with his parents about his mistakes

D．to talk with his parents about his mistakes

可以用华夏银行网上跨行缴存上海公积金吗？咨询电话多少？

连续两学期内务卫生成绩均达到（）以上的个人，方可参加学校个人综合奖励评定。

A.及格

B.良好

C.优秀

D.满分

数据库概念结构的设计是 【12】 。