黄河上游与中游的分界线是( )
A.湖口
B.宜昌
C.河口
D.孟津
黄河上游与中游的分界线是位于内蒙古自治区的河口.故选项C符合题意.
故选:C.
A small plane crashed into a hillside five miles east of the city, ___ all four people on board. [ ]
A. killed
B. killing
C. kills
D. to kill
孤独症的核心症状为()
A.沟通和交流障碍
B.局限的兴趣和行为
C.智能和认知障碍
D.社会交往能力缺陷
E.感觉异常