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【多选题】
PLC 由哪几部分组成A.
中央处理器 CPU
B.
存储器
C.
基本 I/O 接口电路
D.
接口电路，即 I/O 扩展和通讯部分
E.
电源（ +24V ）
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反馈参考答案：
举一反三
【单选题】Why is the chore boy depicted as half-wit?
A.
To tell the vulnerability of friendship
B.
To show that the world is not as simple as right vs. wrong
C.
To show the preposterousness of the reason for taking a person’s life
D.
To show Harry’s sympathy
【简答题】明天见! See you _______.
【简答题】Is ______ three hours ______ the boy ______ family is poor to come to school on foot? A) it; that; whose B) it; that it takes; whose C) it for; that it takes; whose D) it; ...
【单选题】Lincoln, former president of the United States, is aconspicuous example of a poor boy who succeeded.
A.
sturdy
B.
obstinate
C.
permanent
D.
manifest
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