一理想变压器的原线圈AB两端接入电压为μ=32sin314tV的交变电流．原线圈

由两种常见金属组成的混合物A，在合适的条件下可按下图进行反应（部分产物和水省略），已知F为红褐色沉淀，请回答：

（1）混合物A的成分是                                                 （请填化学式）。

（2）写出反应①的离子方程式为：                                             。

（3）写出反应②的化学方程式为：                                           。

Xanos Corporation faced a 50% marginal tax rate last year and showed the following financial and tax reporting information: Deferred tax asset of $1000. Deferred tax liability of $ 5000. Based only on this information and the news that the tax rate will decline to 40%, Xanos Corporation’ s :（）

A. deferred tax asset will be reduced by $ 400 and deferred tax liability will be reduced by $ 2000.  

B. deferred tax liability will be reduced by $1000 and income tax expense will be reduced by $ 800. 

C. deferred tax asset will be reduced by $ 200 and the income tax expense will be reduced by $1000.

普通片崩解时限的要求为（）

A.15分钟

B.30分钟

C.1小时

D.2小时

E.3小时

华人和华桥的本质区别是（）

A．是否有中国国籍

B．是否有中国血统

C．是否是汉族

D．是否长期居住在国外

常用的止血方法有：（）三种。