A low-carbon lifestyle has ______ effect on our daily life. People are paying more and more attention to saving ______ these days.[ ]

A. the, energies

B. a, energy

C. an, energy

D. a, energies

电子商务网站建设一般经过的主要步骤有（）

A.域名注册

B.建立主机并确定主机位置

C.硬件选择

D.软件选择