The tests used in standards for evaluating smoke alarms were developed back in the 1980s. However, despite changes in building materials since then, smoke alarms remain reliable, says Chagger: "They still respond to all the main fires we get today."
韩国总统府青瓦台2月27日说，总统李在明决定以低于市场价的价格出售其自住房，以展现自己稳定本国房地产市场的决心。
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（五）向场内投掷杂物，不听制止的；
"Things are changing," he says.