A:0.1mol•L﹣1 CH3COOH溶液中:c(CH3COO﹣)+c(OH﹣)=c(H+)
B:1 L0.l mol•L﹣1CuSO4•(NH4)2SO4•6H2O的溶液中:c(SO42﹣)>c(NH4+)>c(Cu2+)>c(H+)>c(OH﹣)
C:0.1mol•L﹣1NaHCO3溶液中:c(Na+)=c(HCO3﹣)+c(CO32﹣)+c(H2CO3)
D:等体积、等物质的量浓度的NaX和弱酸HX混合后的溶液中:c(Na+)>c(X﹣)>c(H+)>(OH﹣)
⑴____A. restaurant B. city C. cinema
⑵____A. dress B. coat C. ice cream
⑶____A. want B. supermarket C. park
⑷____A. kite B. read C. sing
⑸____A. tired B. happy C. tea
The little girl could look after _________ though she was only five years old.
“1453年4月6日,争战异常激烈,土军屡攻未逞。4月21日,土军在热那亚人的帮助下……用木板铺设了一条长达15千米的木板划道,上涂油脂,把70多艘战舰经陆地拖进金角湾……”这是关于一场著名战争的叙述。交战双方是 ( )