三直线ax+2y+8=0,4x+3y=10,2x﹣y=10相交于一点,则a的值是( )
﹣1
His parents died in the strong earthquake, so he was _____ in the SOS Village.
A.brought up
B.taken up
C.fed up
D.grown up
为旅游者提供导游服务时,导游人员的头等重要责任是:( )
A.满足旅游者的正当要求
B.努力让旅游者满足
C.帮助旅游者获得美的享受
D.保护旅游者的生命财产安全。