癫病的主要特征为
A．情绪低落B．情绪高涨或易激惹C．精神失常疾病D．痴呆智能低下E．性格行为异常
参考答案：A
In ____Chinese culture, marriage decisions were often made by parents for their children.
A． traditional
B． historie
C． modern
D． remote
下列情况不属于碱基置换后果的是（）
A.同义突变
B.错义突变
C.无义突变
D.终止密码突变
E.染色体畸变
