BBC事實查核指出,美國牛肉價格過去一年上漲15%,僅最近一個月微跌0.9%;蛋價確實下跌34.2%,但整體雜貨價格仍漲2.1%。投資承諾達18兆美元缺乏公開證據,白宮追蹤僅列9.6兆,且多為長期或未兌現承諾。
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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.