旅游团人数变化,入境站地陪要写好书面材料,请计调签字确认。( )
参考答案:错
He thinks only of himself. FIe never________other people. [ ]
A. worries about
B. talks about
C. cares about
D. hears about
以下哪种物质中毒使机体产生高铁血红蛋白血症
A.亚硝酸盐
B.甲醛
C.麻醉药
D.一氧化碳
E.毒蕈