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【单选题】
数控机床操作面板上及机床身上各开关、按钮,主轴正/反转和停止、冷却液的开/关、各坐标轴的点动以及刀架夹盘的夹紧/松开等信号是通过( )接受并控制的A.
伺服驱动装置
B.
位置检测装置
C.
可编程序控制器
D.
变频驱动装置
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举一反三
【简答题】如图所示是一个经过改造的台球桌面的示意图，图中4个角上的阴影部分分别表示4个入球袋．如果一个球按图中所示的方向被击出（假设用足够的力气击出，使球可以经过多次反射），那么该球最后落人哪个球袋？在图上画出被击的球所走的路程．
【单选题】He was often absent from class.________,he didn't pass the final examination.
A.
As a rasult
B.
Because that
C.
With the result
D.
As the result of
【简答题】The patient in Room 542 was coming to the end of his life. He had turned blind and his eyes were f (1). He had also lost his two legs, one m (2) from the midthigh down, the other from below the knee. ...
【单选题】听力原文：M: Madam, I'm sorry I was absent yesterday. But... W: Oh, what's your excuse this time? Q: What can we know from the conversation? (2)
A.
He always apologizes when he is absent.
B.
He is often absent.
C.
He is a polite person.
D.
Many unlucky things have happened to him.
【简答题】完形填空。 Mr Newton was a famous scientist. He liked thinking of some 1 and for it he was often absent-minded (心不在焉的).One evening, when he 2 home at eight o'clock, his family were out. He waited for a lon...
【单选题】设有定义 int i=123; long j=456;下列赋值语句不正确的是( )
A.
j=i；
B.
j=(long)i;
C.
i=(int) j;
D.
i=j;
【单选题】He was often absent from class. _____, he didn ’ t pass the final examination.
A.
As the result of
B.
Because that
C.
With the result
D.
As a result
【单选题】具有空间检索、空间拓扑叠加分析、空间模型分析等功能，它主要指的是地理信息系统的（）功能。
A.
数据采集、监测与编辑
B.
数据处理、图形与交互显示
C.
数据存储与组织
D.
空间查询和分析
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