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单选题 工程图样中,不可见轮廓线采用( )线
学科：【2023秋】——机械图样识读与绘制
时间：2025-12-05 02:12:08
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题目1单选题
在工程图样中,回转体轴线,形体对称中心线采用()表示A. 粗点画线B. 细点画线C. 虚线D. 细实线
题目2单选题
下列给出的绘图比例中,表示缩小的比例是( )A. 1:1B. 2:1C. 10:1D. 1:10
题目3单选题
工程图样中,不可见轮廓线采用( )线A. 点画线B. 细实线C. 粗实线D. 虚线
题目4判断题
尺寸数字应按照国标要求书写,并且水平方向尺寸数字字头应朝上( )A. 正确B. 错误
题目5判断题
放大的比例是指图形比实物放大A. 正确B. 错误
题目6判断题
图形中标注的尺寸为机件的真实尺寸,与绘图比例无关A. 正确B. 错误
题目7判断题
正投影的基本特性是实形性,积聚性和类似性.( )A. 正确B. 错误
题目8填空题
尺寸标注中的符号:R表示 ,Φ表示题目9单选题
What does the news report say about the dragon boat race in DuisburgA. It is held twice a yearB. It dates back to 2,000 years agoC. It attracts 140 teams to participate this yearD. It is a professional boat race with 3,000 participants
题目10单选题
What do we learn about Carsten HahnA. He represented a German insurance company in the boat raceB. He was delighted to be involved in the Chinese cultural eventC. He enjoyed the boat race and had been competing in it for over 20 yearsD. He was pleased to receive the cultural items offered by Chinese people
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