不属于病人的权利是（）。
A.平等医疗权
B.知情同意权
C.自由选择权
D.保管病志权
参考答案：D
He is always helping people without expecting anything _____.
A．in common
B．in turn
C．in danger
D．in return
设
则f(x)在点x=0处
则f(x)在点x=0处