生态系统中能量流动特点是什么（）
A.单向流动
B.双向流动
C.循环流动
D.不流动
参考答案：A
--- My mother doesn’t like going shopping in Hong Kong at all.
---Well, shopping there isn’t liked by _________.
A．anybody
B．nobody
C．everybody
D．somebody
治疗肾病综合征肝肾阴虚证的首选方剂是( )
A．知柏地黄丸B．防己黄芪汤合五苓散C．真武汤合黄芪桂枝五物汤D．实脾饮E．六味地黄丸加黄芪
