中药附子为回阳救逆的第一要药，常用于治疗亡阳症。
参考答案：对
I _________ my pet dog Huan Huan. But I can't _________ it. [ ]
A. look for; finding
B. am finding; look for
C. am looking for; find
D. find; look for
为什么说“灯下不观色”？
