牛膝的功效不包括
A．活血
B．补肝肾
C．强筋骨
D．利水通淋
E．引火归元
参考答案：E
It's really time I went home but I'm enjoying myself, so I ________ here a bit longer.
A．am staying
B．have stayed
C．stayed
D．stay
阿糖胞苷抑制核酸合成的机制
A．抑制核苷酸还原酶B．抑制DNA多聚酶C．抑制二氢叶酸还原酶D．阻止嘌呤核苷酸形成E．抑制脱氧胸苷酸合成酶
