引起肝损伤的含铅类中药有（）
A.雄黄
B.朱砂
C.红粉
D.密陀僧
E.铅丹
参考答案：D, E
Unless you change your ________ towards your studies, you won’t make any progress, I believe.
A．point
B．idea
C．sight
D．attitude
如何改善玻璃的脆性？
