来源于豆科的药材是（）
A.苏木
B.川木通
C.通草
D.大血藤
E.沉香
参考答案：A
-------I heard that Tom failed in the driving test again .
------Just his luck ,_____
A He has to face the fatted calf
B He has to face the music
C He must be the apple of his parents' eye
D He must be a black sheep
城市经济学的含义？
