断面具有“云锦纹”特征的药材是
A. 何首乌
B. 大黄
C. 牛膝
D. 川牛膝
E. 虎杖
大黄的气味是
A. 气微，味微甜而稍苦涩
B. 气微，微甜
C. 气清香，味苦而微涩，嚼之粘牙，有沙粒感
D. 气微，味微苦、涩
E. 气微，味甚苦
药材呈扁长条形或扁圆柱形而弯曲，表面紫褐色或紫黑色，面略具凹槽，断面浅棕红色，维管束呈黄白色点状，排列呈环。此药材是
A. 川牛膝
B. 秦艽
C. 何首乌
D. 虎杖
E. 拳参
[音频]
A. She is about to leave the world.
B. She intends to return to her job.
C. She doesn’t want to work any more.
D. She wants to do something more important.
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