下面生药中，具有抗心肌缺血作用的是（）
A.丁香
B.金银花
C.天麻
D.丹参
参考答案：D
—I heard they broke up!
—______? They were well-matched in high school.
A．So what
B．Why not
C．How come
D．What a pity
请假批准权限中，三天以内由（）批准。
A.不用批准
B.班长
C.辅导员
D.学校领导
