核心价值观，体现着一个社会评判是非曲直的价值标准。
参考答案：对
It was _____ the man came up and spoke to me _____ I realized he was all old friend of mine. [ ]
A. when; then
B. while; which
C. not until; when
D. when; that
旅游者病危，导游人员应尽力帮助抢救，期间发生的一切治疗费用应由( )负责。
A．组团社 B．接团社 C．患者 D．保险公司
