可编程控制器主要由 _、 _、 _、 _组成。
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相关题目
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按照《企业会计制度》规定，企业应当每____编制资产负债表和利润表，至少每____编制现金流量表。………………………………………………………… （ ）
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永续盘存制的特点有______。 ……………（ ）
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“其他应付款”科自核算的内容有______。……………（ ）
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不应计提折旧的固定资产有______。…………（ ）
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陈、隋三论学者多出自法朗门下，其中最著名者为吉藏。他著作 ，陈义__________ ，评判由晋以来各家学说，亦采取南北各派长处，大凡当时流行的经典，多为__________ ，在此基础上，正式建立了三论宗。依次填入画横线部分最恰当的一项是（ ）。
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桌面由桌面背景、_____ 和任务栏组成。
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狂飙突进运动发生在18世纪_____年代的德国。 ( )
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热继电器主要参数有 _、 _ 、 _、_及 _ 。
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可编程控制器主要由 _、 _、 _、 _组成。
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PLC工作过程分为 _、 _、 _、 _、 _。
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路基的湿度类型通常划分为干燥 、_______ 、 潮湿 、______ 。通常要求路基处于 _______ 和 ______ 状态。
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___ is regarded as the pioneer of English drama. ( )
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热继电器主要参数有 _、 _ 、 _、_及 _ 。
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可编程控制器主要由 _、 _、 _、 _组成。
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PLC工作过程分为 _、 _、 _、 _、 _。
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路基的湿度类型通常划分为干燥 、_______ 、 潮湿 、______ 。通常要求路基处于 _______ 和 ______ 状态。
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根据材料,回答题:
In Britain, people have different attitudes to the police. Most people generally ______26______themand the job they do-although there are certain people who do not believe that the police______ 27______have the power that do.
What does a policeman actually do? It is not______28______job to describe. After all, a policeman hasa number of jobs in ______ 29______ . In Britain, he might be in the Traffic Police and ______ 30 ______most of histime______ 31 ______up and down main roads and motorways. A traffic policeman has to keep the traffic ______32______and help when there is an accident. A policeman has to help keep the ______ 33______ , too. If there is a fight or some other disturbance,we ______ 34 ______the police to come and restore order. And they often have to ______ 35 ______situation at greatrisk to their own ______ 36______.
We expect the police to solve crimes, of course, so an ordinary policeman,______ 37 ______ he is not a detective, will often have to help ______ 38 ______and arrest criminals.
And ______ 39 ______ do we call when there is an emergency-an air crash, a ______ 40 ______ , a road accident,or a robbery? We call the police.41a policeman has to be42to face any unpleasant e-mergency that may happen in the ______ 43 ______world.
The police do an absolutely necessary job, they do it ______ 44 ______ well and I support them, but I do not envy policemen, I do not think that I could ______ 45 ______do the job of a policeman.
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Lawrence will do anything for Lily except______________her money.
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Mrs. Morris’s daughter is pretty and ___, and many girls envy her.
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___________in ancient times, the book still appears to readers today,
