已知方程2(m+1)x2+4mx+3m2=2有一根为1,求m的值。
解:把1代入方程,得:2(m+1)×12+4m×1+3m2=2
整理得:3m2+6m=0,则m1=0,m2=-2。
应用ACEI治疗慢性心功能不全,哪项是错误的
A.减轻前后负荷
B.可减轻心室构形重建作用
C.可明显降低病死率
D.能迅速缓解症状
E.可引起低血压及肾功能下降
―That actor often joins in different activities in Beijing. Do you know ?
―For 5 years.[ ]
A. how soon he will come back
B. how long he has stayed there
C. when he went there
D. when he will come here