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【单选题】
PLC的执行程序的过程不包括A.
程序执行
B.
自动刷新
C.
输入处理
D.
输出刷新
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反馈参考答案：
举一反三
【简答题】According to Ekman, the furrowed nose most probably means ______.
【简答题】When he arrived in that country, he found that (there were few occasions to speak Chinese).
【单选题】What dose 'education quite often produces surprises' mean?
A.
Education makes people learn a lot of new things outside the textbooks.
B.
Education is more open-ended and all-inclusive.
C.
Education knows no bounds.
D.
Education is a lifelong process
【单选题】What is happening to the American youth?
A.
They make a new public education campaign.
B.
They lack the basic knowledge about world geography,
C.
They find it easy to identify certain countries on a map.
D.
They are concerned about the future.
【简答题】What's the implication of furrowed eyebrows?
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