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【单选题】集中器和采集器的主要区别是（ ）。 The main difference between concentrator and collector is ( ).
A.
向电能表发送控制命令 Send control command to electric energy meter
B.
向主站上传数据 Upload data to the station
C.
存储电能表的数据 Store the data of the electricity meter
D.
采集电能表的数据 Collect the data of electric energy meter
【单选题】Much unfriendly feeling towards computers has been based on the fear of widespread unemployment resulting from their introduction.Computers are often used as part of automated (自动化的) production system...
A.
After re-training, all employees in the firm get new jobs.
B.
A considerable proportion of people are employed in key posts.
C.
The firm keeps all of its original staff members.
D.
The decrease in staff members may be balanced by the increase of firm activities.
相关题目：
【单选题】集中器和采集器的主要区别是（ ）。 The main difference between concentrator and collector is ( ).
A.
向电能表发送控制命令 Send control command to electric energy meter
B.
向主站上传数据 Upload data to the station
C.
存储电能表的数据 Store the data of the electricity meter
D.
采集电能表的数据 Collect the data of electric energy meter
【单选题】Much unfriendly feeling towards computers has been based on the fear of widespread unemployment resulting from their introduction.Computers are often used as part of automated (自动化的) production system...
A.
After re-training, all employees in the firm get new jobs.
B.
A considerable proportion of people are employed in key posts.
C.
The firm keeps all of its original staff members.
D.
The decrease in staff members may be balanced by the increase of firm activities.
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