On Sundays there were a lot of children playing in the park, _______ parents were sitting together joking.

A．their

B．whose

C．which

D．that

决定神经系统病变部位主要依靠()

A．详细病史询问

B．神经系统体查资料

C．脑脊液结果

D．血生化检查

E．血常规检查