La5B1001<span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">火电厂生产用水是为了维持热力循环系统正常汽水循环所需的补给水。(×)</span><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B1002</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">发电厂的额定功率是表示发电机的输出能力,单位为千瓦或兆瓦。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B1003</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">切削加工性是指金属是否易于进行切削加工的性能。(</span><span lang="EN-US">y</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B1004</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">凡是经过净化处理的水都可以作为电厂的补充水。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2005</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">划线的作用是确定工件的加工余量、加工的找正线以及工件上孔的位置,使机械加工有所标志和依据。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2006</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">蠕变是指金属在一定的温度下发生塑性变形的现象。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2007</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">冲击韧性是指金属材料抵抗冲击载荷作用而不破坏的能力。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2008</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">塑性是指金属材料在受外力作用时产生永久变形而不发生断裂破坏的能力。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2009</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">划线的主要作用是为了节省材料,不造成浪费。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2010</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">钻头的柄部供装长钻头用和起传递主轴的扭矩和轴向力的作用。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2011</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">三角皮带的公称长度是反映三角皮带的外圆长度。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US">La5B2012</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">液面上的压力越高,蒸发速度越快。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US">La5B2013</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">机械强度是指金属材料在受外力作用时抵抗变形和破坏的能力。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US">La5B2014</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">延迟裂纹属于再热裂纹的一种。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2015</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">直接接触物体各部分的热量传递现象叫对流。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2016</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">液体在整个沸腾阶段不吸热,温度也不上升。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B2017</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">热能不可能自动从冷物体传递给热物体。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5Xi018</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">在铸铁加入一些合金元素,这种铸铁称为合金铸铁。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B3019</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">碳钢除了铁碳两种元素外,还含有少量的硫、磷、锰、硅等元素。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B3020</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">一般来说,抗蠕变性能低的材料,有良好的持久强度。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B3021</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">在相同的温度范围内,卡诺循环的热效率最高。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B3022</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">麻花钻有两条形状相同的螺旋槽,其作用是形成两条切削刀的前角,并可导向。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B3023</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">从干饱和蒸汽加热到一定温度的过热蒸汽,所加人的热量叫过热量。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B3024</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">持久强度是指试样在一定温度和规定的持续时间内引起断裂的最大应力值。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La5B4025</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">气体的内动能决定于气体的温度,而内位能取决于气体的比容。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B1026</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">所有金属垫料都应做成齿形垫。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B2027</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">钻头切削刃上各点的前角大小是相等的。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B2028</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">金属材料内部夹杂、表面光洁度低、有刃痕磨裂等,会使材料疲劳强度降低。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B2029</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">低温回火的主要目的是消除工件的残余热应力。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B2030</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">钢在淬火后进行回火,可以稳定组织,提高性能和降低硬度。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B2031</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">按钢的质量分类,主要根据钢中含碳量的多少来分,可分为普通钢和优质钢。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B2032</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">热处理不仅改变工件的组织和性能,而且改变工件的形状和大小。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B3033</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">调质处理就是把淬火后的钢件再进行高温回火的热处理方法。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B3034</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">铸铁的抗拉强度、塑性和韧性比钢差,但有良好的铸造性、耐磨性和减震性。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La4B3035</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">热处理工艺经过加热、保温和冷却三个阶段。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B2036</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">凡是有温差的物体,就一定有热量的传递。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B2037</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">不同液体在相同压力下沸点不同,同一液体在不同压力下沸点也不同。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B2038</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">由数个管径不同的管段串联而成的管道系统称为串联管道系统。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B2039</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">公差是公称尺寸之差。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B2040</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">连通器各容器中的液面始终同高。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B3041</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">螺纹公称直径是指螺纹的最大直径。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B3042</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">流体力学中用下临界雷诺数</span><span lang="EN-US">Re</span><sub><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">临</span></sub><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">作为判别流动状态的标准。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B3043</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">不可压缩流体是指密度可看作常数的流体,它是一种假设的流体。(√)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B3044</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">节流前后产生正压和负压,其中负压是低于大气压的。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3Xi045</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">单头螺纹的导程与螺距是不相等的。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>La3B3046</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">半剖视图是剖去物体的一半所得的视图。(×)</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt;"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';"></span></font></p> |