题目内容

The advantage of geostationary satellites is（）.

A. the range of antenna can cover everywhere in the world
B. we can know the ship’s exact position
C. that the distress alert can be located as soon as possible
D. antenna of permanent earth stations may be directed towards fixed points in the sky

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A. 针对机房局部温度超标，运行作业人员可不予理睬
B. 可通过打开架空地板等方式增加温度超标位置的机房空调出风量
C. 机房局部温度出现超标情况，运行作业人员可在未经机房设备管理人员授意下对空调进行操作
D. 机房设备管理人员组检查设备，定位机房空调的故障部件，故障可以等季度保养时一起维修

A. 正确
B. 错误

A. 竖轴
B. 横轴
C. 视准轴
D. 圆水准器轴