矿物药材信石中以红、黄、白、褐等色相间夹杂而成的花纹称为（）
A.马牙贝
B.元宝贝
C.云头
D.云纹
E.五花层
参考答案：E
_____ hardly made Mike pay any attention to _____ his mistakes．
A．Scolding; correcting
B．Being scolded; correct
C．Being scolded; correcting
D．Having been scolded; correct
地塞米松的作用有（）
A.兴奋腺苷酸环化酶
B.抑制磷酸二酯酶
C.减轻变态反应
D.稳定细胞膜
E.增强β受体的反应性
