具有祛风湿，止痛，解表作用的药物是( )
A．独活B．木瓜C．防己D．秦艽E．豨莶草
参考答案：A
城市生态系统属于人工生态系统。 [ ]
We went to Professor Li’s yesterday. He gave us________. [ ]
A. some advice
B. advices
C. an advices
D. some advices
