在Windows操作系统中，一般采用系统默认的桌面背景图案，用户不可以自行设置。
参考答案：错
—Have you decided which house to buy?
—No, not yet. I must find a house that is ________ for all kinds of transportation.[ ]
A. convenient
B. appropriate
C. available
D. content
邓恩认为政策分析至少包括几个方面？
