There is an Asian (亚裔的) American basketball player in the NB

We have no black America,Latin America or Asian America here,but only a United States of America.

Like other Asian students who come to America for study, most of Chinese students work very hard, they always take a day even two days of the weekend staying in the laboratory overtime. Thus comparing with American students, they make more achievements.
My mentor, who is Asian, is alcoholic, addicted to tobaccon and irritability. But he appreciates the hard work and the solid foundation of knowledge of the Asian students very much, meanwhile he understands the psychology of Asian students particularly.
Therefore, except for one from Germany, the remaining five of all the six students recruited in his laboratory are Asian.
He simply posts a striking signboard on the laboratory door, which says, the research assistants of this lab must work seven days a week, from 10 am to 12 pm, and spare no effort during working hours.
Well known as the strictest and most demanding teacher college-wide, a total of 14 students are recruited into his laboratory during the three years and a half I have spent there, which reduces to only 5 after PhD graduation.
Regardless of all the dissuasion, I forced myself to accept the mentor's assistance at the summer of 1990, and began the difficult journey of academic pursuit from then on.

解题思路：划分人种的主要依据是肤色、眼色、毛发、头型、脸型等体质特征，其中白色人种是目前分布最广泛的人种，黄色人种主要分布在亚洲，欧洲以白色人种为主，非洲以黑色人种为主．

划分人种的主要依据是肤色、眼色、毛发、头型、脸型等体质特征．
故选：D．

点评：
本题考点： 世界主要人种及其分布地区．

考点点评： 本题考查划分人种的依据，牢记即可．

C

解题思路：美国是个移民国家．居民中主要是白色人种，土著居民是印第安人．

美国是个移民国家．居民80%以上是白色人种，土著居民是印第安人，造成美国人口过快增长的主要原因是大量的移民．
故选：B．

点评：
本题考点： 美国人口及其分布和居民的组成．

考点点评： 本题考查了美国的人口，属于基础题．