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【单选题】
PLC 在输出扫描阶段,将( )寄存器中的内容复制到输出线端子上。A.
输入映象
B.
内部存储器
C.
输出映象
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举一反三
【简答题】Questions 26 to 35 are based on the following passage. Since the 1940s, southern California has had a reputation for smog. Things are not as bad as they once were but, according to the American Lung A...
【单选题】It was in__ when he was already in ___ that he went to Yan'an.
A.
the 1940s, the 40s
B.
the 1940s, his forties
C.
1940's, his forties
D.
the 1940, his 40s
【单选题】不同类型的数据适合不同的分析方法,在统计学中常见的分析方法有:相关性分析,方差分析,回归分析,时间序列分析,因子分析,聚类分析等。若要对从EPS数据库中检索的2009年到2017年的增值税额数据进行下一年的预测,最适合用( )进行分析
A.
时间序列分析
B.
聚类分析
C.
因子分析
D.
回归分析
【单选题】He served in the army in _____ when he was in his twenties.
A.
1940’s
B.
1940s
C.
the 1940s
D.
the 1940s’
【单选题】His neighbor came to _______ about the volume of the music.
A.
presentation n. 提交; 演出; 陈述，报告;
B.
complain vi. 抱怨，诉苦; 申诉，控诉，抗议;vt. 诉说，申诉，控告;
C.
expert n. 专家，能手; 权威; adj. 专家的;
D.
involve vt. 包含; 使参与，牵涉;
【单选题】It was in ______ when he was in ______ that he went to Yan’an.
A.
the 1940’s, the forties
B.
the 1940’s, his forties
C.
1940’s, his forties
D.
1940’s, the his forties
【简答题】In 1940 Hughes published______.
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