下列均具有化瘀止血的药组是( )
A．蒲黄、白及
B．槐花、白及
C．藕节、槐花
D．三七、茜草
E．花蕊石、侧柏叶
参考答案：D
----Tomorrow is a holiday. Why are you doing your homework?
-----I am doing these exercises now so that I won’t have _____ on Sunday.
A．it
B．them
C．for
D．to
凡已发布国家标准或专业标准的产品，必须标明产品所执行的（）。
