痿证辨证首当辨
A．虚实B．寒热C．阴阳D．表里E．气血
参考答案：A
Future will be a marvelous world of artificial ______----- robots might have their emotions and we human beings might have robots as friends．
A．preference
B．intelligence
C．exhibition
D．communication
树是结点的集合，它的根结点的数目是( )。
A．有且只有1个
B．1或多于1
C．0或1
D．至少有2个
