阴极保护成功的关键在于将足够的（）通向被保护的设备，以抵消自然腐蚀电流。 ["电流","电压","电阻","电子"]
The energy associated with molecules is known as （）. ["kinetic energy","potential energy","mechanical energy","thermal energy"]
砌筑砂浆、抹灰砂浆等各种砂浆中的过筛净砂，按每立方米（）工日另行计算。 ["0.2","0.3","0.4","0.5"]
Ordinarily the transit（）when the goods leaves the seller’s possession，and ends when they get into the possession of the buyer. ["begins","ends","finishes","complete"]
下列解套方法不正确的是（）。 ["用白纸黑字为借口，可以寻找例外条款","以民意为借口，可以再次进行民意调查","以第三者推托，可以当场拆穿对方的借口","以专业知识为借口，可以用新发现来应对"]
线路连接接触不良（因电阻过大）引起火灾的原因是什么？怎样预防？
