下列哪一项不是瘀血的致病特点（）。
A.易于阻滞气机
B.影响血脉运行
C.影响水液代谢
D.病位固定
E.影响新血生成
参考答案：C
How many ________ are there in March?[ ]
A. day
B. birthdays
C. birthday
The best method to _____ this goal is to unite as many people as possible.
A．undertake
B．conduct
C．perform
D．accomplish
