【简答题】DNS服务器的功能是什么?安装DNS服务器的前提有哪些?
【单选题】下列哪项叙述不是脑膜瘤的特点( )
E.
肿瘤细胞形态多样,常作同心圆状或漩涡状排列或梭形细胞束状交织排列
【单选题】The old town has narrow streets and small houses _______ are built close to each other . [ ]
【多选题】UCS为用户坐标系,在三维环境中创建或修改对象时,可以在三维空间中的任何位置移动和重新定向UCS以简化工作。确定新的UCS的方法有:( )
D.
将UCS与指定的正向Z轴对齐,确定新的UCS
【单选题】The two villages have a close ________ and often help each other.
【单选题】In machinery space, the valves, pipes should be .
A.
arranged as close to each other as possible to save space
B.
arranged far away from each other for convenient operation
C.
be fixed or clamped to avoid vibration
D.
kept easy removable as to convenient repairing work