求微分方程2y"-y’-y=x的通解。
参考答案：
解析：
。
起锯时，槽深有1mm左右，拇指即可离开锯条。( )
The nurse is assessing a postcraniotomy client and finds the urine output from a catheter is 1,500 mL for the 1st hour and the same for the 2nd hour. The nurse should suspect
A．Cushing's syndrome.
B．diabetes mellitus.
C．adrenal crisis.
D．diabetes insipidus.
。
。