剥蚀作用按其营力的不同又可分为风蚀、水蚀、冰蚀、湖蚀等，其中( )是最常见最强烈的一种作用。

单项选择题The three-year-old girl is suffering from a rare illness that （）

A．she has never cried since she was a baby
B．she is made half blind by the strange illness
C．she often chews her own tongue
D．she is unable to feel pain physically

多项选择题作为当代大学生，应该具有的道德品质是（）

A.孝敬父母、勤劳节俭
B.尊敬师长，团结和睦
C.立志勤学，谦虚有礼
D.律己宽人、诚实守信