根据二次根式有意义的条件，得x+5≥0，解得x≥-5．
故选B．
Dr. Smith, together with his wife and daughters, __ visit Beijing this summer.
A．is going to
B．are going to
C．was going to
D．were going to
属于化脓性炎的是（）
A．急性细菌性痢疾
B．肠伤寒
C．急性蜂窝织炎
D．急性重症肝炎
