问题:玩具进行相应燃烧性能测试时,火焰高度为()(燃烧器垂直放置时)...
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:GB/T 14148-2011标准中有关光学玻璃眼镜片毛坯的分等分级规定为()...
Sunday, September 18, 2022
问题:进行燃烧性能测试前,玩具试样应在温度为20℃±5℃,相对湿度为65%±5%的条件下预处理至少()小时。...
Tuesday, September 20, 2022
Tuesday, September 20, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:单选题烟花爆竹产品燃放后不应继续燃烧超过()s。A 20B 25C 30D 35...
Thursday, December 1, 2022
问题:单选题发生工安事故时,须()内完成口头通报,事发后()内于EKP流程类生产管理中填“安卫事故通报单”。A 4小时;一星期内B 2小时;2日C 4小时;2日...
Thursday, April 18, 2024
问题:充气水上玩具应在距气门不大于()处的显著位置上印有永久性的中文或英文安全标记。...
Friday, September 16, 2022
Tuesday, September 20, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:无菌吹瓶生产环境要求:生产中设备故障弹出瓶胚、瓶子需()。...
Sunday, September 18, 2022
问题:判断题可编程序控制器只具数字量或模拟量输入输出控制的能力。A 对B 错...
Friday, August 11, 2023
Saturday, September 17, 2022
问题:单选题纸桶的标准代号是()A GB/T14187B GB 12463C GB/T13252D GB/T325.1...
Tuesday, August 29, 2023
问题:在原子发射光谱分析(简称AES)中,光源的作用是对试样的蒸发和激发提供所需要的能量。若对某种低熔点固体合金中一些难激发的...
Thursday, September 22, 2022
Saturday, September 17, 2022
Wednesday, September 21, 2022