我国民族分布具有“大散居、小聚居”、 ____  的特点．

质量为1kg的质点在xy平面上做曲线运动，在x方向的速度图象和y方向的位移图象如图，下列说法正确的是（   ）

家人的生日表

    I am making a birthday chart for my family. There are eight people in my family. My birthday is on June 9th. My mother's birthday is on June l4th. My father's birthday is on June 23rd. My grandfather's birthday is on April 12th. My grandmother's birthday is on May 12th. My uncle Bill's and aunt Mary's birthdays are on the same day—October 1st. My cousin's birthday is on November 11th. My grandparents live with my uncle and aunt in America, So I usually send e—cards to them for their birthdays. I love my family.