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【单选题】
“实心”命令的用法,不正确的有以下哪三项
A.
轮廓可以是不封闭的线段
B.
必须指定轮廓和路径
C.
路径可以是不封闭的线段
D.
路径可以是样条曲线
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参考答案：
举一反三
【判断题】数控车床加工的时候除了会编程,对刀操作,然而在普通车床上控制外圆的尺寸精度主要是通过操作者的经验,而在数控车床上外圆的尺寸精度主要通过程序或系统里的磨耗来控制,所以这就显示出数控车床在控制尺寸精度上的优势。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：M: Hey, Karen, you are not really reading it, are you? W: Pardon? M: The book! You haven't turned the page in the last ten minutes. W: No, Jim, I suppose I haven't. I need to get through it thoug...
A.
She is worried about the seminar.
B.
The man keeps interrupting her.
C.
She finds it too hard.
D.
She lacks interest in it.
查看完整题目与答案
【简答题】背景 某市政务服务中心办公大楼工程，地下为3层连体车库，地上20层。裙房4层，檐高27m，报告厅混凝土结构局部层高8m，演艺厅钢结构层高8m。框架剪力墙结构，基础埋深12m。地下水位在底板以上2m。桩基、裙房采用落地式钢管脚手架。某施工总承包单位中标后成立了项目部组织施工。施工过程中发生了如下事件： 事件一：项目部编制了《安全生产管理措施》。其中对基础工程施工安全隐患的主要表现形式进行了分析，...
查看完整题目与答案
【单选题】听力原文：M: Hey, Karen. You are not really reading it, are you? W: Pardon? M: The book. You haven't turned the page the last 10 minutes. W: No Jim. I suppose I haven't. I need to get it through though. Bu...
A.
She's worried about the seminar.
B.
The man keeps interrupting her.
C.
She finds it too hard.
D.
She lacks interest in it.
查看完整题目与答案
【多选题】在普通车床两顶尖上加工细长光轴，加工后发现有鼓形误差(中间部分直径大，两端部分直径小)，其主要原因是(    )。
A.
刀架刚度不足    
B.
工件刚度不足
C.
两顶尖刚度不足    
D.
纵向导轨在水平面内直线度误差
查看完整题目与答案
【单选题】听力原文：M: Greg speaking. W: Greg, it's Jane. M: Hey there, how are you? W: I'm good. Listen, I was wondering what you are doing later. M: Hey, I'm at the office. Do you want to call here? A landline is ...
A.
To a bar opening.
B.
To a cinema opening.
C.
To an art gallery opening.
D.
To an office opening.
查看完整题目与答案
【多选题】下面关于螺杆压缩段的描述正确的是( )
A.
压缩段塑料被进一步压实
B.
压缩段塑料进一步被塑化
C.
压缩段使逐渐熔融了的塑料中的气体排出
D.
压缩段是塑料开始熔融到完全熔融的一段
E.
压缩段可以提高塑料的热传导，使温度继续升高
查看完整题目与答案
【多选题】下面关于螺杆均化段的描述正确的是 ( )
A.
均化段塑料被塑化均匀
B.
均化段对塑料的温度均化
C.
均化段对塑料的挤出进行定量
D.
均化段是从压缩段末到机头前的一段
E.
均化段塑料被向前输送
查看完整题目与答案
【多选题】对石膏线接缝、阴阳角拼缝，必须进行精心修补，达到(     )现象。
A.
棱角分明
B.
无掉角
C.
烂角
D.
平整
查看完整题目与答案
【单选题】听力原文：M: Hey, Sally! Are you going to stay in that bathroom for the rest of your life? W: Come on, I just got in here not more than five minutes. M: You're kidding me. You've been there for two hours t...
A.
They hate each other.
B.
They cherish each other.
C.
The boy care about the girl very much.
D.
The boy jokes the girl.
查看完整题目与答案
相关题目：
【判断题】数控车床加工的时候除了会编程,对刀操作,然而在普通车床上控制外圆的尺寸精度主要是通过操作者的经验,而在数控车床上外圆的尺寸精度主要通过程序或系统里的磨耗来控制,所以这就显示出数控车床在控制尺寸精度上的优势。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：M: Hey, Karen, you are not really reading it, are you? W: Pardon? M: The book! You haven't turned the page in the last ten minutes. W: No, Jim, I suppose I haven't. I need to get through it thoug...
A.
She is worried about the seminar.
B.
The man keeps interrupting her.
C.
She finds it too hard.
D.
She lacks interest in it.
查看完整题目与答案
【简答题】背景 某市政务服务中心办公大楼工程，地下为3层连体车库，地上20层。裙房4层，檐高27m，报告厅混凝土结构局部层高8m，演艺厅钢结构层高8m。框架剪力墙结构，基础埋深12m。地下水位在底板以上2m。桩基、裙房采用落地式钢管脚手架。某施工总承包单位中标后成立了项目部组织施工。施工过程中发生了如下事件： 事件一：项目部编制了《安全生产管理措施》。其中对基础工程施工安全隐患的主要表现形式进行了分析，...
查看完整题目与答案
【单选题】听力原文：M: Hey, Karen. You are not really reading it, are you? W: Pardon? M: The book. You haven't turned the page the last 10 minutes. W: No Jim. I suppose I haven't. I need to get it through though. Bu...
A.
She's worried about the seminar.
B.
The man keeps interrupting her.
C.
She finds it too hard.
D.
She lacks interest in it.
查看完整题目与答案
【多选题】在普通车床两顶尖上加工细长光轴，加工后发现有鼓形误差(中间部分直径大，两端部分直径小)，其主要原因是(    )。
A.
刀架刚度不足    
B.
工件刚度不足
C.
两顶尖刚度不足    
D.
纵向导轨在水平面内直线度误差
查看完整题目与答案
【单选题】听力原文：M: Greg speaking. W: Greg, it's Jane. M: Hey there, how are you? W: I'm good. Listen, I was wondering what you are doing later. M: Hey, I'm at the office. Do you want to call here? A landline is ...
A.
To a bar opening.
B.
To a cinema opening.
C.
To an art gallery opening.
D.
To an office opening.
查看完整题目与答案
【多选题】下面关于螺杆压缩段的描述正确的是( )
A.
压缩段塑料被进一步压实
B.
压缩段塑料进一步被塑化
C.
压缩段使逐渐熔融了的塑料中的气体排出
D.
压缩段是塑料开始熔融到完全熔融的一段
E.
压缩段可以提高塑料的热传导，使温度继续升高
查看完整题目与答案
【多选题】下面关于螺杆均化段的描述正确的是 ( )
A.
均化段塑料被塑化均匀
B.
均化段对塑料的温度均化
C.
均化段对塑料的挤出进行定量
D.
均化段是从压缩段末到机头前的一段
E.
均化段塑料被向前输送
查看完整题目与答案
【多选题】对石膏线接缝、阴阳角拼缝，必须进行精心修补，达到(     )现象。
A.
棱角分明
B.
无掉角
C.
烂角
D.
平整
查看完整题目与答案
【单选题】听力原文：M: Hey, Sally! Are you going to stay in that bathroom for the rest of your life? W: Come on, I just got in here not more than five minutes. M: You're kidding me. You've been there for two hours t...
A.
They hate each other.
B.
They cherish each other.
C.
The boy care about the girl very much.
D.
The boy jokes the girl.
查看完整题目与答案
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