具有生津止渴功效的药物是（）
A．生地黄
B．牡丹皮
C．赤芍
D．紫草
E．金银花
参考答案：A
The old man was too poor _____ a room _____. [ ]
A: have; to live
B: to have; live
C: to have; to live
D: to have; to live in
在每一档距内每条导线允许有几个接头？
