Look at _____________ China. [ ]
A. the map of
B. the map
答案：A
π的值等于3.14。[ ]
主枝上长而不圆或下粗上细，下部有纵棱筋的药材是
A．东马鹿茸
B．马鹿茸
C．砍茸
D．二茬茸
E．花鹿茸
