苯丙酮尿症最突出的临床特点是（）
A.智力低下
B.皮肤白皙
C.肌张力减低
D.头发褐黄色
E.伴有惊厥
参考答案：B
Passage One
How did interracial marriage get approved in Alabama a. By a Supreme Court ruling. b. By state legislation. c. By a vote of the residents. d. By the social trend that interracial marriages keep increasing.
影响房地产价格的因素有许多，环境因素不包括( )。
A．大气环境 B．水文环境 C．卫生环境 D．治安环境
