x2+2x=0.
由原方程,得
x(x+2)=0,
则x=0或x+2=0,
解得,x1=0,x2=-2.
Please call _______ Mike.
A. his B. he C him D. her
女性,43岁,因右上腹阵发性绞痛,伴恶心、呕吐4小时来院。查体:体温37℃,右上腹深在轻度压痛,无腹肌紧张,Murphy征阴性。为确诊进一步检查应首选()
A.腹部X线平片
B.白细胞计数和分类
C.BUS
D.测血清淀粉酶
E.PTC