李垣东论相火，认为（）。
A．相火具有常和变两种性质
B．相火为生理之火
C．相火为下焦包络之火
D．相火为三焦、包络之火
E．相火为命门之火
参考答案：C
Mrs Taylor has an 8yearold daughter who has a(n) ______ for painting — she has won two national prizes.
A．ability
B．interest
C．present
D．gift
同一轨道同一方向行驶2列列车距离不少于（）m。
A.50
B.100
C.150
D.200
