据研究,1853年,印度人均消费英国棉纱、棉布9.09便士,而中国是0.94便士。这反映出当时中国( )
A:经济受到鸦片战争的破坏
B:实行保护本国经济的政策
C:经济的发展水平低于印度
D:传统的小农经济根深蒂固
— Is ________ your book?
— No. ________ is my book there(那里).
_____ she is the only daughter of the boss, she started from the lowest position as a common employee.
已知:
①金属离子开始沉淀和沉淀完全时的pH:
Fe3+
Ni2+
Cr3+
开始沉淀
1.5
6.7
4.0
沉淀完全
3.4
9.5
6.9
②Ni2+与足量氨水的反应为:Ni2++6NH3⇌Ni(NH3)62+