划分防雷保护区的目的是为防止或减少雷电对建筑物及其内部电子设备的危害,选择采取既安全可靠又经济合理的防雷措施。()
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膨润土中金属氧化物遇水后能离解出大量的离子,使膨润土的自然电阻率呈现出较低的数值。()
If she stayed in the shower too long, her mom or dad usually banged on the door to rush her so she grabbed a towel and dring off.()
对于含有大规模集成电路的微电子设备,进出设备的信号线和电源线屏蔽层在其进出口处应与设备的金属外壳保持良好的电气接触。()
If you want to make good impression on other people, you have to be yourself at your