Tuesday, December 13, 2022
问题:挤塑过程中人为的将()前后部分的塑料分为固体和流体。A、螺纹壁;B、塑化段;C、塑化温度;D、粘结点。
Thursday, October 26, 2023
Saturday, October 1, 2022
Wednesday, February 22, 2023
问题:钢芯铝绞线按GB/T1179-1999标准规定,其最外层节径比为()。A、10~12B、12~14C、10~14D、14~16
Monday, February 12, 2024
问题:软铜单线的电阻率在20℃时应不大于()Ω·mm2/m。A、0.17241B、0.017241C、0.0017241D、1.7241
Monday, September 12, 2022
Monday, February 12, 2024
Sunday, September 11, 2022
Monday, February 12, 2024
Friday, February 9, 2024
问题:电阻对焊机的主要特点,就是在加热和加压共同作用下形成焊接接头。
Wednesday, March 20, 2024
问题:相邻两道拉线鼓轮圆周线速度之比称为()。A、延伸率B、压缩率C、速比D、滑动率
Friday, November 24, 2023
Wednesday, March 20, 2024
Friday, January 20, 2023
Sunday, September 11, 2022
问题:铝包钢线目前已用于架空地线中的全铝包钢绞和和铝包线的加强芯,它们还能用作()。
Friday, February 9, 2024
Saturday, July 1, 2023
问题:导电线芯直径为0.6mm的通信电缆,成品上导体的断裂伸长率不小于()。A、17%B、21%C、19%D、15%
Tuesday, November 7, 2023
Friday, November 24, 2023
Saturday, December 9, 2023