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【单选题】
G28指令是加工结束后使工件移出加工区,用于( ),G30是用于返回第2、3、4参考点,G29是( )。A.
从参考点返回， 返回到机床参考点
B.
返回到机床参考点， 从参考点返回
C.
返回工件坐标系原点，从工件坐标原点返回
D.
从工件坐标系原点返回， 返回工件坐标系原点
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举一反三
【单选题】What is NOT the cause of the recent explosion in academic movement?
A.
Many scholars like to find an isolated place in a remote area so that they can concentrate on their researches.
B.
Planes can take scholars here and there.
C.
There are more people working in similar fields than before.
D.
There are more learning centres than before.
【单选题】分析下列程序 public class People { int age=8; public int Age { get { return age;} // 只读不可写 } } 则调用下列语句,输出的是?【 】 People p=new People(); Console.Write(p.Age++);
A.
8
B.
9
C.
编译错误
D.
0
【单选题】According to the passage, many scholars and specialists ______.
A.
believe that Asian-American students have higher I.Q.s and are relatively faster learners
B.
attribute Asian-American students' special academic success to their cultural background influences
C.
claim that Asian American students excel in academic performance because of the superior education of their elite parents
D.
agree that Asian or Asian American parents are apt to get their children motivated to work hard
【单选题】分析下列程序 public class People { int age=8; public int Age { get { return age;} } } 则调用下列语句,输出的是? 【 】 People p=new People(); Console.Write(p.Age++);
A.
8
B.
9
C.
编译错误
D.
0
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