造成黄土高原水土流失的主要原因有 ( )
①年降水量大，位于湿润区 ②人类的植树造林活动③地表破碎，缺乏植被 ④黄土本身疏松、干燥的特性
A：①②
B：①④
C：③④
D：②③
My name is Lucy. I have two good friends, Mary and June. June and I are twelve years old. Mary is thirteen years old. My birthday is November 11th．June's birthday is September 11th ．And Mary's birthday is January 18th. I like red, but they like green. Mary and June are in the same school. They have an Art Festival and a school trip every year, but I only have a Music Festival at my school.
2016年4月6日, 国家食药监管总局公布的被假冒奶粉品牌名单中, 除“雅培”外，又新增了“贝因美”。这种假冒行为（ ）
①侵犯了“贝因美”等的商标权 ②侵犯了消费者的知情权、公平交易权
③将被追究刑事责任 ④违背了诚信原则，要承担法律责任
与“魏晋南北朝”、“南方安定”、“北人南迁”、“奠定基础”等关键词相近的历史事件是（ ）
