At the United Nations Climate Change Conference, the UN Secretary General points out that，________， the climate situation will get worse and worse.

A．if not dealing with properly

B．unless dealing with properly

C．if properly dealt with

D．unless properly dealt with

以下哪一项不是内部开发应用程序的不利之处，而是选择商业软件包的不利之处

A．缺乏灵活性。
B．与客户/服务器技术不兼容。
C．雇员抵制有关变化。
D．技术支持不充分。