Фото: Muhammad Sajjad / AP
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There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
「是我要求愛潑斯坦提供飛機的，」她說。
Home sellers are hopeful that lower mortgage rates will attract buyers, per WSJ. Daniel and Kyla Seely, a couple who listed their three-bedroom home in Newark, Ohio, in November for $324,900, are in this category. The Seelys have had no offers so far and are hopeful that declining mortgage rates will turn things around.