According to _______announcement by Guangzhou Price Bureau, _______new measures which have been taken recently are expected to cut the operation costs of each taxi driver by 1280 yuan.

A．the; /

B．an; the

C．/; the

D．an; /

按要求写出下列反应的化学方程式：

(1)一氧化碳通过加热的氧化铜                           ；

(2)碳酸钠溶液和石灰水混合                          ；

(3)硫酸铜溶液中加入铁粉                           ；

(4)光合作用                           。