题目

It was Mother’s Day morning last year and I was doing my shopping at our local supermarket with my five-year-old son, Tenyson. As we were leaving, we found that only minutes earlier an elderly woman had fallen over at the entrance and had hit her head on the concrete. Her husband was with her, but there was blood everywhere and the woman was embarrassed and clearly in shock. Walking towards the scene, Tenyson became very upset about what had happened to the couple. He said to me, “Mum, it’s not much fun falling over in front of everyone.” At the front of the supermarket a chari化学实验必须注意安全,下列说法不正确的是( )A. 如果苯酚浓溶液沾到皮肤上,应立即用酒精洗涤B. 实验室蒸馏原油时,要加入碎瓷片防止液体暴沸C. 实验室制乙烯时必须将温度计的水银球插入反应液中,测定反应液温度D. 为提高实验效率,可用已配制好的银氨溶液与乙醛溶液混合,直接用酒精灯加热进行银镜反应
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