下列属于西北药的是()
A.麦冬
B.当归
C.山药
D.延胡索
E.陈皮
参考答案:B
He makes about $1000 every week,much ______ is spent on books.
A.of which
B.in that
C.among which
D.of it
健康危险度评价的内容错误的是()
A.危险度特征分析
B.暴露评价
C.危害鉴定
D.剂量-反应关系评定
E.污染来源鉴定