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【多选题】
下列关于PLC控制系统设计步骤的描述中错误的是( )。
A.
正确选择PLC对于保护控制系统的技术和经济性能指标起着重要的作用
B.
深入了解控制对象及控制要求是PLC控制系统设计的基础
C.
系统交付前,要根据调试的最终结果整理出完整的技术文件
D.
PLC进项程序调试时直接进行现场调试即可
E.
PLC输出端不许开路调试
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举一反三
【单选题】望远镜的放大率是指()。
A.
垂轴放大率
B.
轴向放大率
C.
角放大率
D.
视觉放大率
查看完整题目与答案
【单选题】救生艇备品中,有探照灯1具,可连续工作不少于_______。
A.
2小时
B.
3小时
C.
6小时
查看完整题目与答案
【单选题】The author writes the passage to
A.
analyze the origin of morality.
B.
make comments on two books.
C.
explore some animal behaviors.
D.
present some intriguing findings.
查看完整题目与答案
【单选题】根据江苏省《房屋建筑与装饰工程工程量计算规范》贯彻意见，土方工程量应（ ）。
A.
按设计图示尺寸以垫层底面积乘以挖土深度计算
B.
因工作面增加的工程量并入各土方工程量中。
C.
因放坡增加的工程量并入各土方工程量中。
D.
因工作面和放坡增加的工程量并入各土方工程量中。
查看完整题目与答案
【单选题】望远镜的放大率是( )
A.
物镜的焦距与目镜的焦距之比
B.
焦距与通光口径之比
C.
目镜的焦距与物镜的焦距之比
D.
通光与焦距口径之比
查看完整题目与答案
【单选题】What does the author imply by saying ''Planet Google' takes a risk similar to trying to board a speeding train''?
A.
Planet Google will be in danger if it stays up to date for long.
B.
Planet Google have to take 300 years to catch the speeding train.
C.
Tile board of Google welcomes Randall Stross to cover Google story.
D.
A written book can only cover a little part of the on-going technology.
查看完整题目与答案
【简答题】( )以下对运动效果的描述中,正确的是?
查看完整题目与答案
【单选题】According to the author, Allan Brandt's attitude towards the cigarette reflected in his book is one of
A.
absolute objectivity.
B.
slight disapproval.
C.
strong disapproval.
D.
total indifference.
查看完整题目与答案
【单选题】Who is the author of Records of Music which was a great music theoretician?
A.
Gongsun Nizi
B.
Wang Bao
C.
Bo Le
D.
Mian Ju
查看完整题目与答案
【单选题】As to the views from the Democrats and Republicans, the author______.
A.
is supportive of both sides
B.
takes an detached attitude
C.
favors Democrats' views
D.
favors the Republicans' view
查看完整题目与答案
相关题目：
【单选题】望远镜的放大率是指()。
A.
垂轴放大率
B.
轴向放大率
C.
角放大率
D.
视觉放大率
查看完整题目与答案
【单选题】救生艇备品中,有探照灯1具,可连续工作不少于_______。
A.
2小时
B.
3小时
C.
6小时
查看完整题目与答案
【单选题】The author writes the passage to
A.
analyze the origin of morality.
B.
make comments on two books.
C.
explore some animal behaviors.
D.
present some intriguing findings.
查看完整题目与答案
【单选题】根据江苏省《房屋建筑与装饰工程工程量计算规范》贯彻意见，土方工程量应（ ）。
A.
按设计图示尺寸以垫层底面积乘以挖土深度计算
B.
因工作面增加的工程量并入各土方工程量中。
C.
因放坡增加的工程量并入各土方工程量中。
D.
因工作面和放坡增加的工程量并入各土方工程量中。
查看完整题目与答案
【单选题】望远镜的放大率是( )
A.
物镜的焦距与目镜的焦距之比
B.
焦距与通光口径之比
C.
目镜的焦距与物镜的焦距之比
D.
通光与焦距口径之比
查看完整题目与答案
【单选题】What does the author imply by saying ''Planet Google' takes a risk similar to trying to board a speeding train''?
A.
Planet Google will be in danger if it stays up to date for long.
B.
Planet Google have to take 300 years to catch the speeding train.
C.
Tile board of Google welcomes Randall Stross to cover Google story.
D.
A written book can only cover a little part of the on-going technology.
查看完整题目与答案
【简答题】( )以下对运动效果的描述中,正确的是?
查看完整题目与答案
【单选题】According to the author, Allan Brandt's attitude towards the cigarette reflected in his book is one of
A.
absolute objectivity.
B.
slight disapproval.
C.
strong disapproval.
D.
total indifference.
查看完整题目与答案
【单选题】Who is the author of Records of Music which was a great music theoretician?
A.
Gongsun Nizi
B.
Wang Bao
C.
Bo Le
D.
Mian Ju
查看完整题目与答案
【单选题】As to the views from the Democrats and Republicans, the author______.
A.
is supportive of both sides
B.
takes an detached attitude
C.
favors Democrats' views
D.
favors the Republicans' view
查看完整题目与答案