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it should be 12,30s. poonu's answer is right, your LP will be issued soon. immigration section of Canada. hahahaha. :--)

hohohoho(我喜欢 compaq M700)
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Last Updated: 2001-11-19
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出一道题，限30s内回答----一个正点报时的大钟，几点就敲击几下，每两下之间5s间隔，问：1）如果要确定是否12点，从第一声起，至少要听几下？2）如果要确定是否6点，从第一声起，至少要听多长时间？
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