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【单选题】
CNC装置中的计算机对输入的指令和数据进行处理，对驱动轴及各接口进行控制并发出指令脉冲，（）电动机以一定的速度使机车工作运动到预定的位置。A.
交流
B.
直流
C.
驱动伺服
D.
步进
手机使用
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反馈参考答案：
举一反三
【单选题】Where do the men take Eliza for her first “outing” as a lady?
A.
Ascot Races
B.
Shopping
C.
To the Opera
D.
To the Market place
【判断题】Facial expressions are not important at all since people cannot see my face on the phone.
A.
正确
B.
错误
【单选题】What does the writer of this passage want to tell us?
A.
Since human beings cannot live alone, neighboring will be important again.
B.
Machines are not good because they keep people apart.
C.
Neighbors are not necessary in our time of machines.
D.
Machines can replace good neighbors as they can work for people and entertain people.
【单选题】Since people cannot learn through legitimate channels all ______ they are anxious to learn, they pick up news wherever they can.
A.
which
B.
as
C.
that
D.
what
【简答题】Losing ecosystem services has serious effects on people’s lives and health. When the Catskills watersheds became too small to purify water well, the drinking water in nearby New York City became unhea...
【简答题】用stress/pressure的适当形式填空 1: More and more people cannot bear the _____ of modern life. 2: The patient is complaining of his feeling of _____ on his chest. 3: Nobody can work well under much _____. 4: R...
【简答题】试翻译下面一段话。切忌抄袭,与直接使用翻译软件。Describe the paper clips as a material that is not used for energy and cannot be excreted. Redistribute the paper clips, giving each student five to ten clips. Repeat the proce...
【单选题】What does the writer of this passage want tell readers?
A.
Since human beings cannot live alone, being neighbor will be important again.
B.
Machines are not good because they keep people apart.
C.
Neighbors are not necessary in our time of machines.
D.
Machines call replace good neighbors as they can work for people and entertain people.
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