单项选择题
A.A network that is restricted.to A single building ,A group of buildings, or even A single room.
B.A network that encompasses an entire city or metropolitanared and connects multiple LANs.
C.A network that connects client devices wirelessly using radio waves.
D.A network that crosses metropolitan, regional, or national boundaries.
单项选择题 Your computer runs Microsoft Windows XP Professional. You share your computer with two other co-workers. You purchase a new computer. You install Microsoft Windows Vista on the new computer. You need to migrate the following content from the old computer to the new computer： All system and program settings All users settings Only the content in the C：\Appdata folder Which tool should you use？ （）
单项选择题 在Excel工作表中，按组合键（），可在单元格内的公式和公式的计算结果之间切换。
判断题 有限股东只具有有限表决权。