【简答题】Briefly describe the route of the YangzeRiver and the Yellow River (where does it originate? Where does it reach? Whichsea does it run into?) and its influence on the people living by it.
【简答题】Most rivers in China run from west to east, and the Yellow River runs that way too. ( Like )
【单选题】下列哪组物质都是一元酸:
B.
H 4 P 2 O 7 和H 3 AsO 3
【单选题】下列哪一组都是人类营养必需的氨基酸( )
【单选题】下列哪一组物质都是氧化剂。()
B.
KMnO 4 、H 2 O 2 、FeSO 4 ;
C.
Ca(CIO) 2 、CI 2 、H 2 ;
D.
HNO 3 、I 2 、K 2 Cr 2 O 7 ;